People join online communities to belong, to grow personally or professionally, to have a say in the brands they use, to be themselves or someone else, and to share a passion. Knowing which of these draws your members tells you what kind of community to build, and what it must give them for it to last.
What kinds of online community are there?
Typically four: communities of interest, purpose, circumstance and practice. Each satisfies a range of reasons for joining, and below, each reason is matched with the types that fit it best.
More brands now see what a thriving community can do: it is one of the most dynamic ways to connect customers to each other and to you. But lasting success depends on understanding why people join in the first place.
Why do people join online communities?
To belong (interest). A sense of belonging has long been considered a basic human motivator, as fundamental as food, water, shelter and love. People look for others like themselves, and a place where they feel at home. Among the like-minded they are reassured that what they are doing is OK, and that they are OK: accepted, included, connected, perhaps even special.
To grow, personally or professionally (practice, purpose). Sharing your thoughts and asking for help can be daunting in the real world, and is easier where you are anonymous and comfortable. Mums go to Mumsnet for answers to parenting questions; a lawyer might join a community purely to exchange knowledge about the profession.
People join for answers, but every community has members who find fulfilment in helping others, and that is why they stay. Answering reinforces who they are: people answering parenting questions feel like knowledgeable parents, and a lawyer who shares unusual knowledge earns recognition from peers that can establish them as an expert. We all like to talk about what we know best.
To have a seat at the table (purpose). One-way communication between brands and consumers is long gone. People want two-way conversations with the brands they love, and successful brands are driven by their customers' feedback and participation, not educated guesswork.
HubSpot, for example, gives its customers a place to share their pains, suggestions and feature requests. Other members upvote the ideas they agree with, and HubSpot can sort by the most liked to see what its users want. Giving customers a voice like this makes them feel heard, and builds a sense of partnership and loyalty.
To be themselves (interest, circumstance). Many join because a community is a safe place. The anonymity of the internet gives them the freedom to be who they are, and to ask the questions they need to without fear of judgement. They don't have to hide their worries, fears or thoughts.
To be someone else (practice, interest). Others join for the freedom to be someone they can't be offline. Nobody sees their face or knows their name, so they can create a new persona and build connections with others. For someone who finds it hard to connect with people offline, that can be a comfort, and help break down social barriers.
To indulge a passion (interest). People want more of what they love, and to fill their free time with it. But not everyone has friends who share their hobbies, especially a niche one, and an interest can fade with no one to share it with. In a community built around a passion, people find others who understand what they are talking about, care to listen, and get the references and the inside jokes.
How can a brand give people that home?
By being the one to provide the space. Nike has built a huge network of running enthusiasts from all over the world around a shared interest, on a branded platform. The conversation isn't always about Nike's products, but it happens under Nike's roof, so the value members get from each other is tied to the brand.
By 2023, 4 Roads had worked on over 150 communities in 15 years, and had seen that a community can be built around anything: however niche the industry, there are always people who want to share it with fellow enthusiasts.
It had also seen how much good a community does. After a while, members' reasons for taking part change: they have found their people, and they are home. How 4 Roads builds online communities.
Updated on 19 September 2026.
