Rollup report suites aggregate data from multiple child report suites and display them in a summarized data set. They provide a convenient place to see summed totals such as page views, revenue, or other basic dimensions. Rollups are frequently used because they do not require additional implementation.
Global report suite: Implementation is altered to send image requests across domains into a single global report suite. If hits are also sent to individual report suites, this practice is known as multi-suite tagging.
Rollup report suite: Created in Admin Tools. Takes the sum of each metric at the end of every day.
Secondary server calls: Rollups do not incur any additional server calls beyond what a single report suite collects. If your organization uses multi-suite tagging, secondary server calls are made for each additional report suite included in an image request.
If you use only a global report suite with virtual report suites, no secondary server calls are needed.
Implementation changes: Rollups do not require any implementation changes, while global report suites require you to include the global report suite ID in your implementation.
Duplication: Global report suites deduplicate unique visitors, while rollups do not. For example, if a user visits three of your domains in the same day, rollups would count three daily unique visitors. Global report suites would record one unique visitor.
Time frame: Rollups are only processed at midnight each night, while global report suites report data with standard latency.
Breadth: Rollups have no way to communicate between report suites. Global report suites can attribute credit to conversion variables between report suites, as well as provide pathing across report suites.
Historical data: Rollups can aggregate historical data, while global report suites only report data from the point they were implemented.
Reports: Global report suites provide data on all dimensions; rollups provide aggregate data on only high-level reports.
Supported products: Rollups can only be used in Reports & Analytics. They are not supported in Analysis Workspace, or Data Warehouse. Global report suites can be used across all products.
Number of aggregated report suites: Rollups only support a maximum of 40 child report suites. Global report suites can be implemented on any number of domains or apps that you own.