The document discusses Salesforce Usage Metrics, which provides insights into how customers use an ISV's managed package. It collects data on Visualforce page hits and Custom Object counts daily and delivers it to the ISV. The ISV sets up an Environment Hub to connect their packaging and reporting orgs to collect and access the usage metrics data. The document demonstrates the usage metrics data and encourages ISVs to enable the feature, set up their orgs correctly, and use the feature to improve customer retention and their application.