Aggregate reports are implemented using Datasets, which are generated asynchronously using Data API.
Note: You must always specify a dataset_id in UUID format when initialising the dataset.

Once completed, the dataset can be retrieved via Data API or rendered in-browser using Reports API.

The "activity-summary-by-group" and "sessions-summary-by-group" are both generated using the same process, with slight variations to the input data.

See the following reference guides for details:

• Datasets implementation guide (describes the general steps for generating a dataset)
• activity-summary-by-group reference guide (describing dataset-specific parameters)
• sessions-summary-by-group reference guide (describing dataset-specific parameters)