Cache and cookies serve purposes in enhancing websites performance and tailoring user experiences. Cache accelerates page loading times, by storing web content in the browser and on the edge servers. On the other hand, cookies simplify tracking user preferences and interests through the retention of personalized data such as web pages and browsing session specifics.
Google Lighthouse is a free tool that helps you analyze the quality of web pages on your website. It audits your pages for accessibility, performance, and SEO and recommends changes to improve them.