The Review Tab
The review tab is where you can see all the details of your campaign. Both the records that will be exported to Editor and the actual ads and extensions as they will look when shown on Google. This gives you a great view of exactly what’s in it and how the ads will look. The review tab is all about simulating the ads and campaign records in your project so that you know exactly what your campaign looks like.
When you first create a new project (campaign), review will only show you that you do not yet have enough information to generate the ads and records. It also points out the first data element that is missing in the sequence of building your campaign - starting with settings.
Once you have sufficient campaign information to generate ads and records, review will display your ads and extensions as they would appear on a Google SERP.
By default, Review starts with View Ads/Extns. Records view shows you the detailed records that will be imported into Ads Editor. This can help to ensure your campaign contains exactly the records you intended.
The best feature of Review is the ability to compare ad designs in one place. This allows you to see exactly how the ads and extensions will look on Google and make refinements where necessary.