You can use the Refinements (also known as template rule) feature to make it possible to test variations in similarly structured page elements. This feature must be used on pages that have a very similar page structure or contain template elements that are structured the same on all pages.
Add a banner to all product pages.
Remove an item from all product pages that use a specific page template
Target different content and experiences to specific audiences(criteria) to optimize your web marketing by displaying the right messages to the right people at the right time.