Main Community: Discord
I love Discord for communicating with people online. I have setup a Discord Server where you can become a Sparkspan and chat with me. I also use this server as a voice chat for groups.
Discord is our main community, but we have various communities in Battle.net, WoW and Twitch as well!
The Battle.net US Community
We have a community in the Battle.net US Region.
World of Warcraft: Battle for Azeroth US Alliance Community
We have a community in World of Warcraft: Battle for Azeroth. Not a guild, but a chat community while playing WoW.