Roll-Up Reporting for Free Google Analytics Accounts
Roll-Up Property is a single property which aggregates data from multiple source properties. This might be useful for businesses that have multiple websites for different regions. In this case, they can safely track each of the regional sites into a separate Google Analytics property and also have a separate roll-up property to analyze a larger amount of data than you have in single-site properties.
Here is how the Google Analytics account structure would look like in case of using the roll-up property: