Definition
The 80/20 Principle (also known as the Pareto Principle) is the idea that a small number of causes typically produce the majority of results. In websites, this means a few key issues or improvements usually account for most performance gains.
Purpose
Using 80/20 thinking helps:
• Focus effort on high-impact changes
• Avoid wasted time on low-value tweaks
• Reduce overwhelm when optimizing a site
• Improve results faster with less work
The goal is not perfection—it’s prioritization.
Common Website Applications
• Navigation clarity – fixing menus and paths users rely on most
• Mobile usability – addressing issues affecting the majority of visitors
• Performance – improving the slowest, most visible bottlenecks
• Conversion access – making contact, checkout, or sign-up easy