Compare Before and After Changes

Every code change has the potential to improve or degrade your site quality. A new feature might introduce render-blocking JavaScript. An image optimization might cut load time in half. Without measuring before and after, you are flying blind.

Running Lighthouse audits before and after deployments gives you hard data on the impact of your changes. You can compare performance scores, accessibility metrics, best practices compliance, and SEO indicators to ensure your changes moved the needle in the right direction -- or catch regressions before they reach all your users.

This practice is especially valuable during performance optimization sprints, refactoring projects, and A/B testing of technical changes. The before/after comparison provides clear evidence of improvement that you can share with stakeholders and document for your team.