Users who aren’t verified as adults will not be able to access age-restricted servers and channels, won’t be able to speak in Discord’s livestream-like “stage” channels, and will see content filters for any content Discord detects as graphic or sensitive. They will also get warning prompts for friend requests from potentially unfamiliar users, and DMs from unfamiliar users will be automatically filtered into a separate inbox.

That shouldn’t be too restricting for people using discord to chat with their friends though.