<em>Moderation</em> is a workflow where comments posted by some users on your site are verified before being published, to prevent spam and other bad behavior. The core software provides basic moderation functionality: you can configure permissions so that new comments posted by some user roles start as unpublished until a user with a different role reviews and publishes them. Contributed modules provide additional moderation and spam-reduction functionality, such as requiring untrusted users pass a CAPTCHA test before submitting comments and letting community members flag comments as possible spam. See @users_overview_topic for more about users, permissions, and roles.