In poems and songs, words with the same or similar vowels are used at the end of some sentences to make the tone harmonious and beautiful. This is the rhyme of poetry. General metrical poetry is to see whether the last word of even-numbered sentences uses the same vowel or similar words. If so, the poem rhymes. If it isn't, it doesn't rhyme.
For modern poetry, it is generally to see whether the last word at the end of a sentence uses the same vowel, and if it does, it is a rhyme. Some modern poems have no rhyme, while others have multiple rhymes.
The so-called rhyme means putting the words with the same rhyme in the specified position.
The so-called rhyme is to classify words with the same vowel into one category, which is called rhyme.