If you create an album and move pictures from your camera roll, why does it stay in my camera roll

Just an additional caution - because albums are just referencing the photos, you cannot move photos out of the library folders „All Photos“, Recents, etc. Do not delete any photo from an Library folder that you want to keep in an album. Deleting a photo from the Library will delete it every, from all albums you added it to.

So many people make this mistake.

There are NO Photos in an Album!!

Just references to the original Photos in the Camera Roll.

You can create as many "Albums" as you want....... the Photos are staying in the Camera Roll.

Rightly said so and very well explained, Helma!