CartoDB's Data Overviews allow for efficiently rendering large datasets on maps by aggregating features into "overview-features" that represent many original features and have aggregated values for their attributes. This process is repeated for all smaller zoom levels, reducing the data targeted to each level's tile size without substantial changes in its aspect. The feature allows users to identify hotspots of data such as airports and provides a platform where location intelligence can be done out of the box, handling large amounts of data without compromising insights.