The document discusses different ad formats on TikTok including TopView, Brand Takeover, In-Feed ads, and Hashtag Challenges. TopView is a video ad format that plays for the first 3 seconds when a user opens the app, then transforms into an in-feed ad. Brand Takeover is similar but uses a 3 second image or gif with sound off. In-Feed ads appear as videos within the For You feed. Hashtag Challenges invite users to create videos with a branded theme. The formats are designed to grab user attention, drive engagement through interactive elements, and link to internal or external pages. Targeting options and frequency caps apply to the different ad placements.