what does it mean to be top 0.5 listener on spotify

To be in the top 0% or top 0.5% of listeners on Spotify means that you are among the top listeners of a particular artist. For example, being in the top 0.5% means that 99.5% of Spotify users listen to that artist less than you. The percentages are a measure of how much you have listened to a specific artist compared to other Spotify users. The top percentages on Spotify Wrapped, such as the top 0.001 or 0.005, indicate that you are a super fan of that artist, having listened to them more than 99.999% or 99.995% of people on Spotify, respectively