25 Social Media Marketing Statistics That Actually Change Decisions

Updated on: 21st Sep 2026

Table of Contents

Social media marketing statistics are only useful when you can see who measured them and when. The figures below are the current benchmarks for a UK or Irish business planning social activity, each one traceable to a named, dated source.

Audience size: 5.79 billion social media user identities worldwide in April 2026, 69.9% of the global population, counting accounts rather than people (DataReportal).

UK reach: YouTube reaches 94% of UK adults, Facebook and Messenger 93%, WhatsApp 90%, and over half of all UK online time is spent on Alphabet or Meta services (Ofcom, December 2025).

Engagement is falling: by followers, TikTok sits at 2.70%, Instagram 0.45%, Facebook 0.13% and X 0.10% in the first half of 2026, with TikTok down 20% across the half year (Socialinsider, July 2026).

Format beats frequency: LinkedIn carousels return a median 21.77% engagement against 3.18% for text posts, and replying to comments lifts engagement by about 30% on LinkedIn (Buffer, 52 million posts).

The money: UK social advertising spend rose 21% to £11.5 billion in 2025, 28% of the digital market, with video taking 59% of it (IAB UK, March 2026).

What it means: organic holds the audience you have, paid finds new people, and the format you choose moves results further than the posting schedule does.

Most pages of social media marketing statistics are a pile of round numbers with no source attached. You can’t plan a budget on those, because you can’t tell whether a figure was measured last month or copied from a blog post in 2019. This page is built differently. Each claim sits in its own block with the organisation that published it, a link to the original, and the date we checked it was still there.

ProfileTree is a Belfast agency working with businesses across Northern Ireland, Ireland and Great Britain, and we maintain this page of social media marketing statistics because we use it ourselves when planning social media marketing for clients. The numbers below settle real arguments: which platform deserves the budget, what a realistic engagement rate looks like, and whether organic effort alone can still reach anyone.

A note on how to read it. A benchmark is a starting line, it isn’t a target. Engagement rates swing by industry, audience size and the formula the measuring tool uses, so treat every figure as a range and check it against your own analytics before you set a goal. Where two credible sources disagree, we say so rather than picking the more flattering one.

These social media marketing statistics describe the size and habits of the audience. They tell you how many people are reachable and how much of their attention is genuinely available.

At the start of April 2026 there were 5.79 billion social media user identities globally, equal to 69.9% of the world’s population. The word “identities” matters: one person with Instagram, TikTok and LinkedIn accounts counts three times, so it overstates the number of individuals you can actually reach.

294 million new identities in twelve months

The global total grew by 294 million identities in the year to April 2026, an annualised rate of 5.4%, or roughly 9.3 new identities every second. Growth hasn’t stalled, but it’s slower than the double-digit years of the last decade.

Almost everyone who is online is on at least one social platform monthly. For most UK and Irish SMEs this means audience availability is not the constraint. Attention is.

18 hours 36 minutes a week, across 6.75 platforms

The typical social media user spends 18 hours and 36 minutes a week on social platforms and actively uses close to seven different ones each month, according to GWI survey data reported by DataReportal. That includes video viewing on YouTube and TikTok, so it isn’t just feed scrolling.

3.58 billion people use a Meta app every day

Meta reported Family Daily Active People of 3.58 billion on average for December 2025, up 7% year on year, across Facebook, Instagram, WhatsApp, Messenger and Threads. This is a company-reported daily figure, so it’s a stricter measure than monthly reach.

Platform Activity Statistics

This is where most social media marketing statistics go wrong, because reach and engagement are measured in ways that are not comparable. Read the denominator before you read the number.

YouTube now has the largest advertising audience

Reported monthly advertising reach in April 2026 put YouTube first at 2.65 billion, ahead of Facebook at 2.39 billion, TikTok at 2.21 billion and Instagram at 1.99 billion. LinkedIn reports 1.43 billion, but that figure counts total registered members rather than monthly active users, which is a materially weaker measure.

Facebook still leads on what people say they use

In GWI’s Q4 2025 survey, 56.3% of internet users aged 16 and over said they had used Facebook in the past month, with YouTube at 55.3%, Instagram at 54.6%, WhatsApp at 54.4% and Messenger at 36.9%. Self-reported use and advertising reach produce different league tables, which is exactly why the methodology matters.

TikTok engagement fell 20% in the first half of 2026

TikTok’s average engagement rate by followers stood at 2.70% in Socialinsider’s mid-2026 quarterly update, its lowest reading in eighteen months and down 20% across the half year. TikTok still leads every other platform, but the gap’s closing.

Instagram sits at 0.45%, Facebook at 0.13%, X at 0.10%

Measured by followers across the same dataset, Instagram dipped from 0.52% in Q1 2025 to 0.45% in the first two quarters of 2026. Facebook has held flat at 0.13% since Q4 2025 and X at 0.10%. If your Facebook page is returning a fifth of a percent, you are at the benchmark, not below it.

LinkedIn carousels return 21.77% median engagement

Across 52 million posts, LinkedIn document and carousel posts recorded a median engagement rate of 21.77%, against 7.35% for video, 6.52% for images, 3.81% for link posts and 3.18% for text. It’s a format-level finding within one dataset rather than a platform average, but the ordering is consistent enough to act on.

Replying to comments lifts engagement by 30% on LinkedIn

In the same analysis, accounts that replied to comments saw engagement rise by about 42% on Threads and 30% on LinkedIn. Replying costs nothing, which makes it the cheapest available improvement for most small teams.

Shares are rising while comments fall

Average shares per post rose 45% year on year on TikTok, 30% on Facebook and 12% on Instagram, while average comments fell 24% on TikTok and 16% on Instagram. People are still passing content on, they’re just doing it privately rather than in public threads, which flatters share counts and depresses comment counts.

Brands post about five times a week on Instagram and TikTok

Average monthly posting sat at 20 posts on Instagram, 15 on TikTok and 24 on Facebook, with X the outlier at 70. Facebook posting nearly halved year on year, which suggests brands are choosing fewer and better rather than more.

Business Results Statistics

A person sits at a desk, viewing charts and graphs on a large computer monitor in a modern office. A coffee cup is placed nearby. The screen displays social media marketing statistics with line and bar graphs in blue tones.

The social media marketing statistics in this section answer the only question a finance director asks: does the spending do anything. The honest reading is that the auction’s getting bigger and slightly cheaper per impression, while the bar for organic reach keeps rising.

Meta served 12% more ads while charging 9% more for each

Across full-year 2025, ad impressions delivered across Meta’s apps rose 12% while the average price per ad rose 9%. Inventory is growing faster than price, which is why paid social remains accessible for smaller budgets even as competition increases.

Meta took $200.97 billion in revenue in 2025

Meta’s full-year 2025 revenue reached $200.97 billion, up 22% year on year, almost all of it advertising. That’s the scale of the market your organic post is competing against for the same feed position.

Social media accounted for £11.5 billion of UK advertising spend in 2025, up 21% year on year and 28% of the total digital market. Social isn’t just growing with the other digital formats, it’s taking share from them.

Nearly six pounds in every ten spent on UK social advertising now goes to video. If you are still producing static images as your primary paid format, you are buying against the grain of where the money and the inventory have moved.

The UK digital ad market grew 10% against GDP growth of 1.4%

Total UK digital advertising reached £40.5 billion in 2025, growing seven times faster than the wider economy. Budgets are moving online faster than the economy’s expanding, which is a competitive pressure rather than an opportunity.

“The teams that get value from social media data are the ones who walk in with a question. They are not asking what the engagement rate is, they are asking whether the carousel format is worth the design time this quarter. The number only earns its keep once there is a decision waiting on it.” Ciaran Connolly, founder of ProfileTree

Global figures are a poor guide to a Belfast or Dublin audience, so we’ve separated them out. These UK social media marketing statistics come from Ofcom, the statutory regulator, and from the IAB’s audited spend study, so they carry more weight than vendor surveys.

UK adults spend four and a half hours a day online

Average daily time online for UK adults reached four hours thirty minutes, up ten minutes on the previous year. Women averaged four hours forty-three minutes, twenty-six minutes more than men.

YouTube reaches 94% of UK adults

YouTube was used by 94% of UK online adults, with average viewing of 51 minutes a day excluding the television set. For a UK SME weighing where to put production effort, that’s the largest single audience available.

Facebook and Messenger together reach 93%, WhatsApp 90%

Meta’s services remain close to universal among UK adults. Facebook’s reported death has been consistently premature in UK data, whatever your feed suggests, whatever the engagement rate says about how people behave once they are there.

Over half of UK online time is spent on Alphabet or Meta services

Two companies now account for more than 50% of all time UK adults spend online. Any plan that treats social, search and video as separate decisions is ignoring how concentrated the attention really is.

Instagram’s UK monthly reach is 78%, or 38.5 million adults

Instagram reach grew 7% year on year to 78% of UK online adults. Reddit grew faster still, up 28% to reach 60% of UK internet users, though Reddit users average only four minutes a day against 28 minutes for TikTok users.

30% of UK searches now return an AI overview

About three in ten searches show an AI summary, and 53% of UK adults say they see these often. Social content increasingly feeds the systems that write those summaries, which is why social, search engine optimisation and content planning now belong in the same conversation.

UK advertising spend across all media reached £46.9 billion

Total UK advertising expenditure rose 10.1% in 2025. Social’s £11.5 billion share means roughly one pound in four of all UK advertising money now goes to a social platform.

What These Numbers Change In Practice

Four decisions follow from the social media marketing statistics above, and they’re the ones worth arguing about.

Pick two platforms, not seven. Audience overlap is high enough that one or two large platforms reach most of the people you could reach anyway. A B2B services firm in Belfast will get more from LinkedIn and YouTube than it’ll get from chasing TikTok trends. A local retailer or hospitality brand usually does better on Instagram and Facebook. This is the first thing we settle when planning digital marketing services for a client.

Change the format before you change the schedule. The gap between a LinkedIn carousel and a LinkedIn text post is far wider than the gap between posting three times a week and five. Posting more often into a format that doesn’t work is the most common wasted effort we see.

Assume paid is part of the plan. With Facebook engagement at 0.13% of followers, organic alone holds the audience you already have. It won’t find you new people at any useful rate. Deciding the organic and paid split belongs in a digital strategy, not in a per-platform guess.

Make video, and make it native. Video is 59% of UK social ad spend and YouTube reaches 94% of UK adults. That’s usually where in-house effort stalls, which is why we run video production alongside content marketing so videos serve a planned calendar rather than appearing at random.

How ProfileTree Turns These Statistics Into A Plan

Data is the input, not the work. The work is deciding which two platforms to commit to, what formats to make, how much to put behind paid, and how to measure whether it paid off.

We start by reading your own analytics against the benchmarks on this page, so any target is grounded in your audience rather than a borrowed average. From there the plan covers platform selection, content formats, a realistic cadence, the paid budget split, and the conversion path back to your site. For teams building the skill in-house, ProfileTree also runs digital training so the strategy keeps running after handover.

Social performs best when it is wired into everything else: the website design it points to, the hosting that keeps it fast, and the search visibility that supports it. A growing share of first-touch enquiries now arrives through AI chatbots rather than a contact form, which changes what the landing page needs to do.

Frequently Asked Questions

Which social media platform gives businesses the best return?

There’s no single answer, and any page of social media marketing statistics that gives you one is selling something. LinkedIn tends to work hardest for B2B because the buying audience arrives in a professional frame of mind and carousel content performs unusually well there. Consumer brands more often see better returns from Instagram, Facebook and YouTube, where reach is cheaper and visual content does the work. Match the platform to where your customers actually spend time and to the funnel stage you’re trying to influence, then measure against your own baseline rather than a published average.

Why do different sources give completely different engagement rates?

Because they’re measuring different things. Engagement can be divided by followers, by reach or by impressions, and all three are defensible. A rate calculated against reach will look far higher than the same activity measured against followers, even though nothing’s changed. Before you compare your number to a benchmark, check which denominator the benchmark used, then recalculate yours the same way. This single check resolves most of the apparent contradictions in published social media marketing statistics.

Are these social media marketing statistics still accurate?

Every figure carries its publication date and the date we last confirmed it, so you can judge for yourself how much weight it deserves. The underlying sources update on different cycles: Ofcom publishes Online Nation annually, IAB UK publishes Digital Adspend annually, DataReportal updates quarterly and Socialinsider issues quarterly revisions. A figure checked in September may have moved by January. Use published social media marketing statistics to set a sensible starting expectation, then confirm against your own account data inside the first month of any campaign.

Is organic social media still worth doing for a small business?

Yes, but for a narrower job than most people expect. At 0.13% engagement on Facebook and 0.45% on Instagram, organic posting holds and warms the audience you already have. It isn’t an efficient way to reach new people, whatever the headline social media marketing statistics suggest. The workable model for most SMEs is consistent organic content to maintain the relationship, plus targeted paid spend to find anyone new, with the split decided by what you are trying to achieve rather than by what feels affordable.

How much should a small business spend on social media advertising?

There’s no percentage that fits every business, and the platform you choose changes the arithmetic more than the budget size does. Start small on one platform that matches your audience, measure cost per lead rather than cost per impression, and scale only what converts. Meta’s own reporting shows ad inventory growing faster than ad prices, which means the auction’s still reachable for modest budgets. Build on a tested organic foundation rather than using paid spend to compensate for content nobody wants.

How often should we review our social media strategy?

Review performance monthly and run a fuller strategic review each quarter. Monthly checks catch tactical problems, such as a format that’s stopped working or a posting time that’s lost reach. Quarterly reviews are for the bigger calls: dropping a platform, moving paid budget, or changing the content mix. The first half of 2026 saw TikTok engagement fall 20% while Facebook held flat, which is exactly the kind of shift a quarterly review catches and an annual one doesn’t.

Do engagement benchmarks differ between small and large accounts?

They do, and the difference is mostly rate against scale. Smaller accounts often post higher engagement rates because a smaller, more connected audience interacts more readily. Larger accounts benefit from recognition, which can lower cost per click and lift total conversions even when the percentage looks less impressive. Neither position is better in the abstract, they’re just different. A small business should lean into the engagement advantage with responsive, personal content and consistent replies, which the data shows lifts engagement by around 30% on LinkedIn alone.

Should social media data change what we publish on our website?

Increasingly, yes, though it’s a recent shift. With 30% of UK searches returning an AI summary and over half of all UK online time spent on Alphabet and Meta services, the same content is being read by people and by systems that summarise for people. Original data, clear answers and material that can be cited tend to travel further in both places than promotional posts do, and that’s true whether a person or a summariser is reading. This is the reasoning behind treating social, search and site content as one plan rather than three.