Fan also like is the special feature of spotify. The working of FAL depends on the similarity in data between two artists. The fans having two artists in common and the larger the share of each artist's total fan, spotify considers them the same. For example, if a band has 10,000 fans and 6000 of them also exist in other's band list then it means the bands are similar.
Moreover, FAL also uses the data shared descriptions that no just use the content on spotify but also from blogs, different sites, and magazines. Spotify scrapes millions of web pages each day and combines different information like artist descriptions and other sources.
After that, it looks for patterns in shared descriptive vocabulary to determine the interest of fans.
