The document discusses market segmentation for Mozilla Corporation. It analyzes different user groups based on their usage characteristics like average usage days, page views, minutes, and browser sessions. The key segments identified are Primary Retention, Secondary Retention, Secondary Engagement, Primary Acquisition, Secondary Acquisition, and Light Users. Given a limited budget, Mozilla will focus its strategy on the higher usage Primary Acquisition, Primary Retention, and Secondary Retention segments, which together account for 69% of total online minutes.