You know the risk. You desperately want to make that change, but don’t do it. Do not touch an ad that’s working. It’s too big of a gamble.
The Learning Phase has a major impact on the peformance of your Facebook ads. Here’s a guide to help take advantage of the benefits of the Learning Phase.
Before editing a successful ad set, know that certain edits will trigger the learning phase. If that happens, high performance may not return. Details here.