How TikTok's algorithm works

In The Know by Yahoo

In June 2020, TikTok revealed some of the basics behind its infamous “For You” page. The FYP recommends content by ranking videos based on a combination of factors... which fall into three main categories: user interactions, video information and device and account settings. Each of these factors is then assigned a weight, based on their value to the interest. According to TikTok, a strong indicator of interest would be whether a user finishes watching a video. A weaker indicator is whether the video’s creator is in the same country as the consumer