These two rhetoric figures are the classic examples of writing techniques that are as easy to employ as they are to be overdone and make what you're writing feel awful, like you're trying too hard.
What they mean is sort of obvious from the name, and that's your first help: unlike other rhetoric devices, they're as simple as the name sounds.
Consonance is the repetition of the same consonant sound in a sentence, verse or stanza. Assonance, similarly, is the repetition of a vowel sound in a short sequence.
You probably read or heard both of them a lot! Either in ads or Literature or songs, assonance and consonance are a very helpful trick. Th