Page speed is how quickly a page loads and becomes usable for visitors.
The biggest wins are usually compressed, correctly sized images, fewer third-party scripts, caching and a fast host or CDN.
Google PageSpeed Insights combines a lab test (Lighthouse) with real-user data from Chrome where it is available.
SEO is the work of improving a website so it appears higher in unpaid search results for the searches its customers make.
SEOTechnical SEO makes sure search engines can find, crawl, render and index a website’s pages without problems.
SEOOn-page SEO is optimising the content and HTML of individual pages so they match what searchers are looking for.
SEOOff-page SEO is everything done outside your own website to build its authority, mainly earning links and brand mentions.
