A revision round is one cycle of: the provider delivers work → the client reviews and provides feedback → the provider makes adjustments. Most professional rates include 2-3 revision rounds in the base price.
Clear revision policies prevent scope creep and protect both parties. The client gets reasonable opportunity to refine the work; the provider has boundaries on how many changes are included.
Additional revisions beyond the included rounds are typically charged per round. Having specific, consolidated feedback (rather than drip-feeding changes) makes revisions more efficient for everyone.