The minimum age specified in Discord’s Terms of Service is 18. If the server’s community is structured around mature-audience-only topics, or if the vast bulk of the server’s material gets geared toward players aged 18 and up, the server must be labeled mature-audience-only.
As a result, Discord implemented a method to ensure that its users are at least 18 years old. They take these measures to protect their users and prevent them from viewing inappropriate content.