This document discusses how slow load times can hurt the user experience on websites and provides suggestions for improving performance. It notes that users expect pages to load within 2 seconds and cites studies showing that even small improvements in load time (1 second or less) can significantly increase conversion rates and other metrics. Common causes of poor performance are discussed, such as inefficient stylesheets, unoptimized JavaScript, and large images. The document provides many suggestions for optimizing front-end and back-end performance, such as creating a performance budget, minimizing page weight, deferring scripts, optimizing third-party content, and continuous monitoring.