AdWords Campaign Experiments ACE Retiring
Starting from 17th October 2016, you will no longer be able to create adwords campaign experiments ACE. All existing campaign experiments will continue to run until 1st February 2017. After 1st Feb 2017, all existing campaign experiments will automatically stopped running and all un-applied changes will be removed. AdWords recommend to end any active campaign experiments before 1st Feb 2017.
Improved AdWords Campaign Experiments and Drafts Introduced
You can start using campaign drafts and experiments which AdWords introduced earlier this year. Campaign drafts and experiments is very powerful to test changes in AdWords Campaigns. You can measure results and can also apply experiment that are well performing.
AdWords campaign drafts and experiments allows new features and additional flexibility which are not available in ACE (AdWords Campaign Experiments).
To have better understanding about Campaign drafts and experiments, please visit AdWords Help Center: About Campaign Drafts and Experiments