Image Source: Numerical Algorithms Group Have you noticed how TikTok and other social media platforms know exactly our likes, dislikes and mental state? How does it do it? Well, through an algorithm. An algorithm is as simple as a set of instructions, a math equation, or as complex as an efficient code that a computer uses to follow commands. Social media companies use that information to send us targeted media. The Wall Street Journal in 2022 investigated how TikTok tracks users interests. It created 100 bot accounts and assigned each bot different interest, which were not disclosed to the app. We would not be surprised if TikTok decided which videos to show on "for your page" by tracking likes, follows, and shares. Yet, the Wall Street Journal discovered that the algorithm only needs to know how long we spend watching a video and less than 40 minutes of total usage to know all of our interests and mental state. It is both amazing and scary that an application can le...