Monthly listeners is the number of different people who played Los Dareyes De La Sierra on Spotify in the last 28 days. One person who streams a song a hundred times counts once. Spotify works it out again about once a day, so the number here changes once a day and stays put in between.
Followers (3,017,749) is a different number: people who pressed Follow on the artist profile. It grows slowly and rarely drops, while monthly listeners jumps up and down with releases, tours and playlists.
We save one number per day, so the history above grows by a point every day. Want the number on your site or stream? Use Embed code or OBS link under the counter.