What does parallelism refer to in writing

Parallelism refers to using elements in sentences that are grammaar similar

sound, meaning, or meter. This technique adds symmetry, effectiveness and balance to the written piece.

In grammar, parallelism, also known as parallel structure or parallel construction, is a balance within one or more sentences of similar phrases or clauses that have the same grammatical structure. The application of parallelism improves writing style and readability, and is thought to make sentences easier to process.