Discord

Discord is an instant messaging and VoIP social platform which allows communication through voice calls, video calls, text messaging, and media and files.

Many use Discord for coordinating/communicating Roll20 games between sessions, or for video/voice during sessions, instead of Roll20's native video/voice.

Roll20 Activity

Roll20 Activity on Discord became available as a beta to roll20 subscribers on April 30th, 2024.

Get ready for the ultimate crossover event! Roll20, the leading virtual tabletop, is teaming up with Discord to bring the full Roll20 experience to life as an embedded Activity within Discord. And Roll20 Pro subscribers get to be among the first to try it out in an exclusive beta test launching next week (on April 30th). This means you and your gaming group can summon a full-featured virtual tabletop complete with maps, tokens, character sheets, and all the Roll20 tools you know and love – and play within the Discord interface. The best part? You can keep using Discord’s voice and video chat while rolling dice, moving tokens, and traversing your campaign world together. No more juggling between apps and windows – just one seamless role-playing experience. – Riley Dutton - Founder in Residence - April 24th, 2024

Beta

Info in participating in the beta can be found i this forum post (only visible to Pro users): The Roll20 Activity Pro Beta on Discord is Live!^(Forum)

You'll be prompted to log into your existing Roll20 Pro account. Do not create a new account – only existing Pro subscribers can launch the Activity during the beta.
Once you log in, you should see all your existing campaigns and have the option to create a new game. You can invite players to your voice channel at any time, and they will have the option to join the Activity as players, too!

The Activity includes:

The full virtual tabletop with maps, tokens, layers, etc
Integrated character sheets, 3D dice, and compendiums
All your current campaigns, assets, and marketplace content
Access to official modules for D&D, Pathfinder, Marvel, Fallout, and more (coming soon)
Dynamic lighting (Pro/Plus only)
Built-in video/voice chat via Discord