Sixteen social platforms now report at least half a billion users each, and 5.79 billion accounts are active across all of them, equal to 69.9% of the world’s population. No business needs sixteen platforms. Most need to understand about a dozen and actually use two or three.
This is the reference version: what each platform is, who’s on it, what people do there, how the ads work and what to do in your first week. If you want my opinionated ordering instead, I’ve ranked the platforms worst to best in a separate post, and the raw numbers live in my 2026 social media statistics roundup.
I’ve grouped the twelve by what they’re for, because that’s how you should choose between them.
- Meta’s family: Facebook, Instagram, WhatsApp
- Video: YouTube, TikTok, Snapchat
- Places people go to research things: Pinterest and Reddit
- Professional networking, which means LinkedIn
- Public text conversation: X, Threads, Bluesky
1. Facebook
Facebook is still the largest social network, with 3.07 billion monthly users. In GWI’s global survey, 56.9% of online adults had used it in the past month, more than any other platform. The audience is older than it used to be. Among US teens, usage dropped from 71% to 32% in under a decade, while adults over 35 never left.
People mainly use Facebook to message friends and family and to take part in Groups, which matters for what you post. Community-style content does well: local news, customer photos, events, questions. Polished brand announcements mostly sink.
Advertising runs through Meta Ads Manager, the same system that covers Instagram, Threads and WhatsApp. You pick an objective (traffic, leads, sales), define an audience, and install the Meta pixel on your site so the system can learn who converts. Clicks typically cost $1 to $3, which makes Facebook the cheapest serious place to learn paid social.
First week: set up a business Page with complete contact details and opening hours, join or start one Group where your customers already talk, and install the pixel even if you aren’t running ads yet. It starts collecting data from day one.
2. Instagram
Instagram reached 3 billion monthly users, and it’s the platform younger adults most often name as their favourite. It’s visual first: Reels (short vertical video), Stories that vanish after 24 hours, carousels and single photos. Reels get the most reach by a wide margin right now, so a brand that refuses to make video will struggle here.
Two things make Instagram useful for business beyond its size. People there follow brands by choice and like posting their own content, so customer photos and tags come naturally. And Gen Z uses it as a search engine. GWI data shows 67% of Gen Z searching on Instagram, slightly more than use Google. Your bio, your pinned posts and your captions are what they find, so write them with search in mind.
Ads use the same Meta account as Facebook, and you can tag products so posts become shoppable. For the practical side, I’ve compared Instagram schedulers and Instagram analytics tools in detail.
First week: switch to a professional account (it’s free and gives you Insights), write a bio that says what you sell and where, and post three Reels before you worry about anything else.
3. WhatsApp
Most “platforms to know” lists skip WhatsApp, which is odd for something with 3 billion monthly users. Measured by which apps people open on their phones, it ranks second in the world behind YouTube and ahead of every Meta social network.
It isn’t a place to broadcast. It’s where customers in much of Europe, Latin America, India and the Middle East expect to ask a question, book an appointment or chase a delivery. The free WhatsApp Business app gives you a business profile, a product catalogue, quick replies and away messages. Meta’s ad system can also run “click to WhatsApp” ads on Facebook and Instagram that open a chat instead of a web page, which suits businesses that close sales through conversation.
If your customers are mostly in the US, this matters less. Anywhere else, put the WhatsApp number on your site and your Instagram bio this week.
4. YouTube
YouTube has the biggest advertising audience of any platform at 2.58 billion people, and it’s the most-opened social app in the world. It reaches every age group. Nine in ten US teens use it, 73% of them daily, and it’s just as normal for a 60-year-old looking up how to fix a tap.
That second example is the point. YouTube works like a search engine, and it’s owned by Google, so videos show up in Google results too. A video that answers a real question can keep bringing in viewers for years. Nothing else on this list has that shelf life except Pinterest.
There are two formats to know. Long videos (tutorials, demos, reviews, interviews) build trust and search traffic. Shorts are YouTube’s answer to TikTok, and the same vertical clip can be reused on Reels and TikTok. Ads are bought through Google Ads and include skippable ads before videos and ads in the Shorts feed. They need decent video creative, which is the real barrier.
First week: list the ten questions customers ask you most. Each one is a video title. Record the first with a phone and a cheap microphone. Audio quality matters more than picture quality.
5. TikTok
TikTok’s ads reach 1.99 billion adults. People open it to be entertained, and messaging friends or following brands barely figures in why they’re there. That shapes everything: content that feels like an ad gets swiped away in a second, while a funny or useful 20-second clip from an unknown account can reach a million people.
Two recent changes are worth knowing. The US ban threat ended in January 2026, when the American business moved into a joint venture majority-owned by Oracle, Silver Lake and MGX, with ByteDance keeping 19.9%. And TikTok Shop turned the app into a real sales channel: eMarketer expects US Shop sales to pass $20 billion this year, led by beauty and personal care.
Ad options include in-feed video ads, Spark Ads (paying to boost an existing post, yours or a creator’s) and Shop ads that link straight to a product. About half of US consumers have also used TikTok’s search, so put the words people would type into your captions and on-screen text.
The downside is workload. TikTok rewards frequent posting and an audience there doesn’t carry over reliably from one video to the next. Go in knowing that.
6. Snapchat
Snapchat has 932 million monthly users and 55% of US teens use it, mostly to message close friends with photos and short videos. For most businesses it’s the hardest platform on this list to use well, because so much of the activity is private. It earns a place if you sell to under-25s: fashion, beauty, food, entertainment, events. Ads appear between Stories and in the Spotlight video feed, and branded AR lenses (the face filters) are Snapchat’s signature format. If your customers are over 30, you can safely leave it alone.
7. Pinterest
Pinterest is a visual search engine more than a social network. Its 640 million monthly users (a record, up 11% in a year) save images and videos called pins onto themed boards: kitchen ideas, wedding outfits, weeknight dinners, trip plans. They run about 80 billion searches a month, and most of those searches are for ideas, with no brand name attached. That gives a small, unknown business a fair shot at being found.
The old picture of Pinterest as a platform for millennial women is out of date. Gen Z now makes up more than half the user base.
Every pin links out to a website, so Pinterest sends traffic in a way Instagram never has, and pins keep circulating for months. A business account gives you analytics, a trends tool and the option to turn any pin into an ad or connect a product catalogue for shopping ads. One caveat from Pinterest’s own filings: it earned $30.84 per user in the US and Canada last year and $0.83 per user elsewhere, so the buying audience is concentrated in North America.
First week: claim your website in a business account, create five boards named the way people search (“small balcony garden ideas”, not “Our Products”), and pin ten vertical images to each.
8. Reddit
Reddit is a collection of more than 100,000 forums called subreddits, each run by volunteer moderators with its own rules. Users post, comment and vote things up or down. It had 130.3 million daily users in Q2 2026 and passed half a billion weekly users for the first time.
For a business it does two jobs. The first is research. Whatever you sell, there’s a subreddit where people complain about your category in plain language, and reading it for an hour will teach you more than most surveys. The second is reputation. Reddit threads rank high in Google and are among the sources AI assistants cite most, so what people say about you there travels far beyond Reddit.
Self-promotion gets removed and mocked. What works is taking part as a named person, answering questions in your area and being open about who you work for. Reddit’s ad platform (promoted posts that appear in feeds and inside comment threads) has grown quickly. Ad revenue rose 64% last quarter and there’s now a Shopify integration, but prices rose about 40% in a year as well.
First week: find three subreddits in your niche, read their rules, and do nothing but read and comment helpfully. Don’t link to your own site.
9. LinkedIn
LinkedIn is the professional network: profiles work as CVs, companies have Pages, and the feed is about work. It reports more than 1.3 billion registered members, though it doesn’t publish how many are active each month, and the real figure is certainly much lower.
If you sell to other businesses, this is your platform. People keep their job titles and employers up to date for their own career reasons, which means targeting by role, seniority, industry and company size is more reliable than anywhere else. You pay for that accuracy. Clicks run $5.50 to $12 against $1 to $3 on Meta, so the ads only make sense when a customer is worth thousands. Campaign Manager offers sponsored posts in the feed, message ads that land in inboxes, and lead forms that pre-fill from the member’s profile.
Posts from personal profiles usually travel much further than posts from company Pages, so the founder or a senior person posting regularly beats a busy company Page. I’ve reviewed the writing and scheduling tools built for that in my Taplio alternatives post.
First week: complete your personal profile properly (photo, headline that says who you help, featured links), create the company Page, and comment thoughtfully on five posts a day from people you’d like as customers.
10. X (formerly Twitter)
X is the short-text, real-time platform, strongest for news, sport, politics, finance and tech. Its reported ad reach is 557 million. Usage has shifted since the 2022 takeover: the mobile audience was down to 125 million daily users by January 2026, though X still draws 145.4 million web visits a day, far more than its rivals.
Businesses get two practical things from it. Customer service is one, since complaints and questions arrive in public and a quick, human reply is seen by everyone. Listening is the other. X’s search is good for finding what people say about your brand, your competitors and your industry, and a social media monitoring tool can do that watching for you.
Promoted posts are the main ad format. Moderation has loosened and brand safety is a fair concern, so many advertisers keep budgets small. Secure your handle either way.
11. Threads
Threads is Meta’s text app, launched in 2023 and tied to your Instagram account. It passed 500 million monthly users in June 2026 and has more daily mobile users than X. The catch is depth: people spend only about five minutes a day there.
Its advantage is how cheap it is to try. Your Instagram followers can follow you in a tap, posts are quick to write, and ads are bought in the same Meta Ads Manager as everything else. If you’re already on Instagram, posting a few times a week on Threads costs you almost nothing. I wouldn’t start there.
12. Bluesky
Bluesky looks like early Twitter and runs on an open protocol, which lets users choose their own feed algorithms and, in theory, move their followers elsewhere. It has close to 46 million registered accounts, but active use has fallen. Similarweb counted 10.4 million monthly mobile users in June 2026, less than half the late-2024 peak. The people who stayed are engaged, and they lean toward journalists, academics and politically active users. There’s no mature advertising offer. Know what it is, and join only if that’s your audience.
Picking yours and keeping up with them
The average person uses 6.5 platforms a month, so your customers are reachable in several places and you only need to be good in a couple. Choose by behaviour. If people research your kind of product before buying, go where the research happens: YouTube, Pinterest, Reddit. If they buy on impulse, Instagram and TikTok. If they buy through a conversation, Facebook, WhatsApp or LinkedIn.
Then make the posting routine rather than heroic. A social media scheduling tool lets you load a few weeks of posts in one sitting, and if you like building workflows, several now plug into n8n, Make and Zapier. Check your analytics once a month for leads and sales. Ignore follower counts. Drop any platform that has produced neither after three months.