The verdict
For a small B2B team that wants to see what an audit finds without committing, I would start with Adzooma. It costs nothing to connect an account, and the findings are easy to act on.
If you manage meaningful spend across several accounts and want rules doing routine checks while a person approves changes, pick Optmyzr. Start with alerts and only automate changes once you trust a rule.
If you run one small account, I would skip both. The paid tools need enough spend to justify the time, and Optmyzr in particular does not get cheap on a small budget.