Lesson 1 / 25
Why performance matters
Understand the impact of web performance on user experience and business metrics.
Performance and business impact
Every 100ms delay in load time can result in a 1% drop in conversion rates. Fast sites retain more users, reduce bounce rates, and improve SEO rankings. Performance is not just a technical metric—it directly affects revenue and user satisfaction.
Holistic approach
Performance optimization spans backend rendering, network transfer, parsing, rendering, and user interaction. Focus on the full pipeline, not just one area.
Quick check
Quick check: What is the typical conversion impact of 100ms delay?
- About 1% drop in conversions
- About 5% drop
- Performance doesn't affect conversions