Hashtag activism is when people on social media use a hashtag- like #BlackLivesMatter or #MeToo- to spread awareness or rally support around a cause. People use these hashtags to post their own thoughts and stories, link to articles, or just let other people know they care about an issue. The goal is to show that lots of people are standing together and trying to make change. For example, after a shooting of an unarmed black person, people might come together and use #BlackLivesMatter on social media to show their support for ending police brutality and demanding justice.