This document provides instructions on how to use TikTok, including how to get started, record and edit videos, use hashtags and sounds, and leverage other features. It notes that TikTok is a social video app built around trending music where users can create 15-60 second videos. Key aspects include using popular songs, hashtags, effects and engaging with others through duets and reactions. The algorithm promotes content it thinks a user will like based on what they interact with.