Connections Grid gives you a multi-dimension view of the connection between datasets, audiences and segments.

Datasets are connected in any of the following scenarios:

• Your own datasets. These datasets are automatically connected because you always have permission to reference your own data.
• If you own some of the datasets and have permission to reference the other. You'll see that permission on the Permissions Received tab.
• If datasets belong to other parties, and you have permission to reference them in combination with others that you have permission to use. Again, you'll see both those permissions on the Permissions Received tab.

On the Data Sources section in the Connection Grid tab, you'll see all the datasets you are able to reference. You'll see your audiences and segments by changing the data source type.

You can drag and drop datasets, audiences and segments into a grid to calculate custom connections between them.

You can change from absolute values to percentage. 

When you have found your custom connections,  you can export the results into a CSV file that shows you the keys used for matching and the count of the intersection, union and exclude.