These exercises are great for putting together drum beats and drum fills, like they would appear in a song. Well, in a song the fills would happen less often than this, but the beats have been shorten so as to practice both fairly equally.
The drum fills are ideal for those quite new to playing drum fills. Some subdivision knowledge of quarter notes, 8th noets and 16th notes is useful.
The drum beats may be hard for complete beginners, so some experience of playing them first is recommended before mixing them with the fills, which are a bit easier than the drum beats.
Related: 10 beginners drum beats with 2 beat drum fills exercises
Related (Premium): Beats and Fills Drum Book – Basic Beginners