The Unique User Reach report returns data in a bubble chart. Each bubble is sized in direct proportion to the number of unique users for your selected dimension. A larger bubble indicates greater reach than a smaller bubble. The Unique User Reach report helps you find the advertiser, brand, campaign, creative, placement, or site that provides the broadest reach against your targeted users.
Your Unique User Reach report could look similar to the one below. In your report, click on a bubble to view the underlying data.