Needed clarity on song metrics

[sebastianmirz]

I have been using the tool Exportify in order to retrieve data on Spotify playlists with the intent to make a network analysis. However I have been met with various metrics and descriptions of the songs that appear on a given playlist, such as "Popularity", "Key", "Mode", "Energy" and many more. Any of you know what these metrics are based on, and what specifically they mean?

[Ximzend]

You can read about audio features at this page: https://developer.spotify.com/documentation/web-api/reference/get-several-audio-features