This document discusses key elements for building and maintaining an online community. It identifies that communities are built on commonality, shared experiences and goals, as well as shared conflicts. Essential elements include a common goal or motivation, shared conflicts, and rewards for participation. Online communities differ from in-person communities in that they are not bound by physical location and allow for more diversity and easier participation, but can be harder to vet members and build trust. The document outlines different types of online communities and roles within communities like content creators, experts, influencers, and super sharers. It provides strategies for using various social media platforms like Instagram, Twitter, YouTube, and Pinterest to engage and grow an online community.