system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How are "albums sold" determined in this era of music streaming?
gpt
The music industry has a specific unit for that: the "Album-equivalent unit". A single physical album sale is defined to be equivalent to ten song downloads, or 1500 song streams. 

So, if you as an artist sells 5000 albums, people download your song 10.000 times, and your music was streamed 1.300.000 times, you are credited with 'selling' 6800 albums.