What Does “Building a Community” Actually Mean for a Startup?

I’ve talked to a lot of founders, and almost everyone gives the same advice: “Build your product and do sales at the same time. Also, build a community alongside it.”

I get the first part. Shipping and selling together makes sense. But the “community building” part? That’s where things get blurry for me.

Does community building mean posting regular updates on Twitter or LinkedIn? Does it mean making Instagram reels about the product? Or is it more about actually talking to potential customers one-on-one? When people say “build a community,” do they mean creating a place where users can interact with each other or just a way to keep them engaged with the product?

The reason I’m asking is that I see different approaches everywhere. Some founders document their startup journey on social media, and that seems to attract an audience. Others focus on getting early users into a private group (Discord, Slack, or WhatsApp) and nurturing relationships there. And then there are those who take a totally different approach—like building in public, sharing code, or offering free tools to bring people in.

For my startup, I’m trying to figure out what community building should look like in 2025. The startup landscape has changed drastically in the past year, especially with AI and automation becoming more mainstream. Founders no longer have time to manually interact with every user. So what’s the new way of doing this? What’s working for early-stage startups today?

I’d love to hear thoughts from fellow founders. What does “community” actually mean in today’s world, and what’s the best way to build one?