There are popular chat rooms, that can have more than 500,000 followers and can get up to 20,000 viewers at once. This is due in part to the 'follow' button, which permits viewers to receive notifications when the model is broadcasting. Another aspect of the site's inner workings is the use of 'mods', short for 'moderators', voluntary users who oversee that the broadcasts are compliant with Chaturbate policy, such as no violence or underage models. Models need not be humans, as is the case with Projekt Melody, an artificial intelligence ' cam girl', who has about 20,000 followers.