This document defines bounce rate and exit rate and explains why they are important metrics for analyzing user behavior on websites. Bounce rate refers to the percentage of single-page sessions, where users landed on a page and exited without interacting with the site further. Exit rate refers to the percentage of total sessions that exited from a particular page, whether after one page view or multiple pages. The document discusses how bounce rate and exit rate can vary between different types of pages and provides examples to illustrate the difference between the two metrics. It emphasizes analyzing these rates by landing page and keyword to understand user satisfaction and identify opportunities for optimization.