Why do poets use rhyme schemes?

Answer :

In traditional poetry, a regular rhyme aids the memory for recitation and gives predictable pleasure. A pattern of rhyme, called a scheme, also helps establish the form. ... In modern free verse, rhyme breaks the pattern and adds unpredictable spice, giving special emphasis to the lines that rhyme.
In traditional poetry, a regular rhyme aids the memory for recitation and gives predictable pleasure. A pattern of rhyme, called a scheme, also helps establish the form. ... In this pattern, the lines with the same letter rhyme with each other.