PageSpeed Insights (PSI) is a tool from Google that tests your site's performance on both desktop and mobile devices.
Keep in mind that, as per Google’s definition: “These rules are general front-end best practices you can apply at any stage of web development”. In this sense, the score that you get from Google’s PageSpeed test does not tell you how fast your site actually loads, but how your site fares based on Web Optimization rules that advance the rendering and execution of front-end codes (HTML, CSS, etc).
One useful recommendation from Google PageSpeed is the"Optimize Image" section. These are often a major cause of slow websites. Compressing your images before uploading may improve your PageSpeed. Check out these image compression services and see what works for you:
We also constantly update our site rendering technology to have a speed improvement when testing with Google PageSpeed Insights. The majority of Strikingly sites now score over 90% on the Google PageSpeed test.
- You may have to run the test a few times to see improved scores! This forces the site to be recached, which improves load times around the world.
- If you add any third-party scripts or custom code, that may take extra time to load and run, and this may decrease your PageSpeed score.
- Visit more tips to Improving Your Site Page Load Speed.
Full compliance to W3C is not a strict requirement to make your website SEO compliant. W3C compliance simply implies that the HTML and CSS code that your website built is compliant with the standards set by the W3C.
If you want your site to rank high in SEO, make sure that your site is regularly updated, has high quality and relevant content, and gets quality backlinks by sharing and distributing your site.