I think it means find the beat the note gets. So if you have a quarter note, write a 1 under it if it’s the first note in that bar. For 8th notes, write 1 and if it’s first. For example, the first line would be this- 1 2 3 4, 1 + 2 3 4, 1 2 + 3 4, and 1 2 3 + 4.
