The Rock Album is a collection from Whitesnake that includes the best rock songs as selected by the band itself.
As stated from the band through the official video description of the new song Always the Same:
The album is the first release in the band’s “Red, White and Blues Trilogy,” a series of fresh, new collections organized by musical themes that will include: LOVE SONGS (red), THE ROCK ALBUM (white) and THE BLUES ALBUM (blue).