Here is the External Links section of our Code of Conduct:
External Links
The LFG Forums and the LFG Tool are meant to promote games and find
groups to play with on Roll20. The addition of external links within the
LFG areas of the site for promotional purposes (Patreon, PayPal
Donations, etc.) or invitations to off-site communities (Discord,
Off-site message boards, etc.) is prohibited and will result in removal
of the post. You're free to use Discord and invite players to your
server once they join the game. You may place the link on your game details page or on a post to your
game details forum or in a private message to someone. You may not place the link on your LFG Listing or in a post to your LFG Listing Discussion forum or in a post to the community forums or in your user profile. Twitch and Youtube are a little different; as long as you're using the Roll20 interface, go ahead and post showcases of your game :)