Re: How to Structure Your AdWords Account for Optimal Split Tests
Basics are that you should structure your account the way you have your website structured. Doing this will make it easy for you to understand how the account structure works and you can easily find the information and optimize the account accordingly. More details around this topic are covered up here: https://support.google.com/adwords/answer/2375470?hl=en
Split testing means that you want to try different ad copy version and see how one ad performs better than other. This term can also be related to your landing page optimization and you might try different landing pages for best ROI.