https://www.cnbc.com/2018/04/04/how-to-see-everything-twitter-knows-about-you-and-download-your-tweet-history.html

Twitter knows a lot about you, including where you've been and the advertisers you're interested in. We're going to show you how to download that information.

It's important to understand what social media companies know about you, particularly in the wake of the leak of Facebook data, where political analytics Cambridge Analytica obtained information on more than 50 million users.