If you are managing large or complex accounts or have extensive campaign naming taxonomies, Google Ads custom dimensions might be able to help simplify your reporting efforts and campaign naming systems.
Don’t confuse this with custom dimensions in Google Analytics. Custom dimensions in Google Ads lets users append annotations to your campaigns in order to report on categories and subcategories aligned with your business structure and goals.
As an example, it’s possible to set up and run custom dimensions to see aggregated campaign performance by product line and department. It’s currently in beta right now and can be accessed from the “Tools” dropdown in Google Ads when enabled.