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6 Best Practices for Growing Your Community on Social Media
Online communities give people with a shared interest a place to talk, swap ideas and help each other. If you have built an online community and want more members, social media is usually the cheapest place to find them, because the people you want are already there. This article covers six practices that work for forum, group and membership communities alike.
Last updated: 6 November 2026
Quick answer: To grow an online community on social media, start with the followers you already have, give people a clear reason to join, post on the one or two platforms where your audience actually spends time, run paid ads selectively, stay honest about what the community offers, and use scheduling and analytics tools to see which posts bring in members.
How can you grow your community using social media?
Starting a community from zero is hard. You do not know where the first members will come from, and keeping the current ones engaged takes steady effort. Social media helps with both problems because the audience is already assembled. DataReportal counted 5.81 billion social media user identities worldwide at the start of October 2026, which it describes as close to seven in ten people. Reach is rarely the issue. Relevance is.
Here are six practices that turn that reach into members.
1. Use your existing networks
If you already have a social media account with followers, do not open a new one just for the community. Those followers are your warmest audience, and they already know how you write and what you care about. You can use the account to promote your community directly.
A personal account usually earns more trust than a brand page, because people respond to people. If the community belongs to a company, post from the brand account as well and have team members share it from theirs.
Join conversations on your topic, not just your own posts. Ask existing followers to like, comment on and share the announcement. Each share puts the invitation in front of people you could not have reached alone.
2. Give people a reason to join
Nobody joins a community because you asked. They join because of what they get. Say plainly what members receive: answers from peers, early access, special offers, templates, or a place to meet people in the same line of work.
Then keep the promise visible. Share a useful thread, a member win or a question from inside the community every time you post. A feed of fresh, specific posts shows visitors that the place is alive, and an active community is the strongest argument for joining it.
3. Do not avoid paid advertising
Many community owners avoid ads. That is a mistake when organic reach stalls. Organic posts mostly reach your followers and a slice of their networks. Paid promotion lets you put the same invitation in front of people who have never heard of you, filtered by interest, location or job title.
Be strategic about the spend. Start with a small budget, promote one clear offer, and compare the cost of each new member across platforms before you scale up. Marketing analytics software makes that comparison much easier.
4. Find out where your audience spends time
Know who your target members are and which platform they use. If they are not on Instagram, an Instagram account wastes your time. Platform use differs by audience. In Pew Research Center’s 2026 survey of US adults, 84% said they use YouTube, 70% Facebook and 51% Instagram. Those numbers describe the general public, so check them against your own niche before you commit.
A quick way to check: ask your current members where they hang out, and look at where competitors in your space get the most replies. Once you know, watch how people on that platform talk and post in that style. Keep every post simple, so a stranger understands the invitation in one read.
5. Be authentic
Do not pretend to be bigger or more established than you are. Inflated claims bring in people who leave a week later, and that hurts a young community more than a small member count does.
Describe the community realistically, including who it is not for. Show the real people running it. Trust builds slowly, and it is the main reason people stay long enough to invite others.
6. Use the right tools
Doing all of this by hand does not scale. The right social media tools let you schedule posts across platforms, reply from one inbox and measure which posts bring in members.
Track a short list of numbers: link clicks to your join page, new sign-ups per post, and how many new members post within their first week. Clicks tell you what attracts people. First-week activity tells you whether the right people arrived.
Common mistakes to avoid
Posting only links to the join page is the most common one. People scroll past promotion, so mix invitations with useful content from the community.
Another is spreading across five platforms with no time to answer comments. One active channel beats five dead ones.
The last is ignoring new members. A person who joins and gets no reply in a day rarely comes back, so welcome people by name and ask one easy question.
To end with
An online community is only as good as the people in it. Start with the audience you have, make the benefit obvious, meet people where they already are, and measure what works. Done steadily, social media becomes a reliable source of the right members.
Frequently asked questions
Which social media platform is best for growing an online community?
The one your target members already use. For a general consumer audience that often means Facebook, YouTube or Instagram, while professional communities tend to do better on LinkedIn. Ask your first members where they spend time before you pick.
How do I get my first members?
Invite people you already know: followers, customers, colleagues and email subscribers. Offer a clear benefit for joining early, and start a few real conversations yourself so new arrivals find activity.
Are paid ads worth it for community growth?
They can be, once your join page and welcome flow work. Test a small budget on one platform, measure the cost per new member, and only scale if those members stay active.
How often should I post about my community?
Post as often as you can keep up with comments and replies. A steady schedule of a few useful posts a week beats a burst of daily posts that you cannot sustain.
Should I run the community inside a social network or on my own site?
Use the social network to attract people and your own site to hold them. A community on your own domain gives you control over data, rules and branding, which a platform can change at any time.
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