How do you get the best results when you are editing campaigns, ad sets or ads in Ads Manager

How do you get the best results when you are editing campaigns, ad sets or ads in Ads Manager

The answer is :

To get the best results, you can duplicate then edit (rather than just edit) campaigns, ad sets or ads so you can run multiple versions simultaneously. (note that if you change an ad object, the new version replaces the old one)