Data Studio - Data Blending is finally here

Data blending or creating relationship with multiple data sources is one of the most useful features in reporting.

By default, charts in Data Studio get their information from a single data source. Blending lets you create charts based on multiple data sources, called a blended data source. For example, you can blend two different Google Analytics data sources to track the performance of your app and website in a single visualization.
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Blending can reveal valuable relationships between your data sets. Creating blended charts directly in Data Studio removes the need to manipulate your data in other applications first, saving you time and effort.