13.3. Bridge Filters

Introducing Bridge Filters

Bridge filters extend the concept of bridge fields to filters in Looker Studio. As we saw earlier, filters are part of a data source and cannot be applied to a chart that uses a different data source. However, with bridge filters, we can make Looker Studio apply a filter from one data source to a chart that uses a different data source.

Creating and Applying Bridge Filters

To create a bridge filter, follow these steps:

Create a filter in your first data source (e.g., Google Analytics) based on the bridge field you created earlier. For example, filter the "Country-Bridge" field to show only "United Kingdom".
Save the filter.
Apply the filter to a chart based on the same data source (e.g., Google Analytics). This should work as expected.
Apply the filter to a chart based on a different data source (e.g., Google Sheet) that has the same bridge field. Looker Studio should now recognize the bridge field in the second data source and apply the filter accordingly.

This way, you can apply a single filter to different data sources by using bridge fields to make Looker Studio believe that the fields in different data sources are the same.