Engagement rate: This demonstrates how much an artist engages with their audience. We calculate this by dividing the total number of interactions (likes and comments) in the last 2 months by the total number of followers, multiplied by 100.

Major-owned playlists: These are playlists made by the music industry majors: Digster playlists by Universal Music, Filtr playlists by Sony Music, and Topsify playlists by Warner Music.

Notable followers: are other influencers (i.e., the accounts with over 1,000 followers) that follow the account in question.

Official playlists (also known as editorial playlists): These are playlists made directly by the streaming platforms' editorial teams. More about playlist types here.

Spotify ML: This means Spotify Monthly Listeners. You can find this abbreviation in the Audience section of an artist profile and the "Compare Artists" feature. Spotify uses a rolling window of 28 days because the number of days in a calendar month varies, and people listen differently on different days of the week. Using a window of 28 days means they always include an equal number of each day (i.e., the same number of Mondays, Tuesdays, Wednesdays, etc.).

Spotify fan retention: This metric shows the relationship between the number of Spotify monthly listeners and the number of Spotify followers. Do take into account that not all followers are listeners. We calculate this by dividing the total number of ML by the total number of followers, multiplied by 100. The higher the percentage is, the better the artist can turn its listeners into followers.

Third-party playlists: These are playlists that don't fit in the other two categories (made by users of streaming platforms).

TOC (either DOC or WOC): This stands for Time on Chart, which can either be Days on Chart or Weeks on Chart, depending on if it is a daily or weekly chart. You'll find this mentioned in the chart section of the artist and song profiles or the market charts.

YouTube views: YouTube's view count is calculated by combining each official version of a song, including the official music video, user-generated content that uses the official song, and lyric videos.