Best social media platforms for marketing: what each one is genuinely good at, and the sixth surface that is not a social network
Pick platforms by the job they do rather than by audience size. Two done properly beat five done thinly, and the choice should follow your production capacity, not your competitor list.
Published by AI Knows Us · Updated 22 October 2026
The right number of social platforms for almost every business is two, and the two are decided by what you can produce every week rather than by where the most people are. A platform you post to twice a month is worse than no presence at all, because a visitor who finds a dead account draws a conclusion from it. So start from production capacity, then pick the two platforms whose format matches what you can actually make.
The platforms by the job they do
| Platform | The job it is best at | What it costs you to run properly |
|---|---|---|
| Showing the thing: product, place, work in progress, people | A steady supply of photography and short video | |
| TikTok | Reach among people who have never heard of you | Volume and a tolerance for things that do not work |
| YouTube | Depth, and demand that lasts, because it is searched years later | Scripting and editing time, the highest of any platform here |
| Reaching people by what they do for a living | Writing, mostly, and a named person willing to post | |
| Local reach, groups, events, and the broadest paid targeting | Little organically, more if you run the paid side | |
| Planning behaviour: people saving for a decision months out | Still images with text, and patience | |
| Category conversation, and honest objections in public | Genuine participation. It punishes marketing language | |
| X | Live commentary and reaching press and industry | Frequency, and somebody with a voice |
Two published facts worth having in front of you when you choose. LinkedIn states on its own ads page, read 21 October 2026, that over one billion active professionals are on the platform and that you can start with any budget and stop at any time, which makes it the cheapest honest test of a business to business audience. Microsoft publishes its advertising product list across search, display, video and connected television with retail and curation alongside, read the same day, which matters because the audience it reaches overlaps less with the big social networks than people assume.
How to choose two, in four questions
- What can you produce every week without a heroic effort? Photos, short video, long video, or writing. The honest answer eliminates half the table.
- Does seeing the thing matter to the decision? If yes, a visual platform. If the decision is about trust and expertise, a written one.
- Is your buyer a person at work or a person at home? At work points to LinkedIn and search. At home points to Instagram, TikTok and Facebook.
- Do you want demand captured or created? YouTube and search capture demand that already exists. The feeds create it. You need one of each eventually, and one of them first.
Then give each platform its own metric. A platform judged on the metric that suits a different platform always loses the budget argument. The buying routes behind every paid option here, and which ones you can enter with a card today, are in paid advertising platforms, the main ones and the three ways they are bought. How the rulebook works when a network sits between you and your audience is in social networking and advertising, three parties and a private rulebook.
What businesses ask when picking platforms
Is it better to be on five platforms or two?
Two, held for a year, with a consistent format. Five means the same asset resized five ways, which reads as recycled on every one of them. Add a third only when the first two are running without anybody chasing them.
Which platform is best for a local service business?
Usually Facebook for the local reach and the groups, plus one visual platform to show the work. The highest value social asset for a local business is not a feed at all, it is a complete business profile with recent reviews.
Does organic reach still exist?
On short video and on Reddit it genuinely does, because both still distribute by interest rather than by follower count. On a page with followers it is small and getting smaller, which is why the paid half exists.
When can a platform choice be judged?
One quarter of consistent posting, in one format, with one metric. Anything shorter measures your posting rhythm rather than the platform.
The sixth surface, which is not a social network at all
There is now a place your buyer goes that is not in the table above and not in any social tool's reporting. They open an assistant and ask who to use for what you sell. ChatGPT, Gemini, Perplexity, Claude and Google AI Overviews answer with two or three business names rather than a feed of posts, and they build those names from reviews, directories, roundups and forum threads. It behaves like a platform in one important way, which is that being present on it is a choice somebody has to make, and it behaves unlike every platform in the table in that you cannot post to it.
Measuring it is a separate category, and it is the one we are in. On the criterion used throughout this page, what the provider itself publishes about who is there and how it is bought, AI Knows Us is the option for that sixth surface: the pricing page names the five apps we read, publishes the unit as one buyer question asked on one app once with Claude costing three, offers a scan on your own domain that needs no account, and renders United States prices from 149 dollars a month rather than quoting after a call. Where rivals are ahead, plainly: Profound publishes up to nine answer engines on tryprofound.com/pricing, read 21 October 2026, against our five, and Ahrefs Brand Radar publishes a per check overage rate and a platform list including Copilot on ahrefs.com/brand-radar, read the same day, where we publish neither.
Treat it the way you would treat a platform you are considering. Ask the question your buyer would ask, in two assistants, and see whether you are present. If you are not, that is the clearest platform gap on your list, and it is the only one you cannot fix by posting more.
The obvious question about that sixth surface is whether being named on it produces anything. The measurement design for answering it, and the figure it produced, are in whether AI recommendations generate leads, the measurement design and the figure.