#MeToo is a social movement and awareness campaign against sexual abuse, sexual harassment, and rape culture, in which people publicize their experiences of sexual abuse or sexual harassment. The phrase "Me Too" was initially used in this context on social media in 2006, on Myspace, by sexual assault survivor and activist Tarana Burke. The hashtag #MeToo was used starting in 2017 as a way to draw attention to the magnitude of the problem. "Me Too" empowers those who have been sexually assaulted through empathy, solidarity, and strength in numbers, by visibly demonstrating how many have experienced sexual assault and harassment, especially in the workplace.

A hashtag is a metadata tag that is prefaced by the hash symbol, #. On social media, hashtags are used on microblogging and photo-sharing services such as Twitter or Tumblr as a form of user-generated tagging that enables cross-referencing of content by topic or theme. For example, a search within Instagram for the hashtag #bluesky returns all posts that have been tagged with that term. After the initial hash symbol, a hashtag may include letters, numerals, or underscores.