Slack is one of those messaging apps. It’s a place where you can communicate with various teams, collaborate on projects, and much more.
But what are Slack communities?
In essence, they’re similar to Facebook groups, but they exist on Slack. Each Slack community is based around a specific topic (e.g., link building) and provides a place for members to share knowledge and insights about that topic. Members can also message other members directly.
Read more at https://ahrefs.com/blog/seo-slack-communities/