Whenever you click on a link to visit a site a request gets made to the server. The server answers with a status message (header) and a file list for that website. After viewing that list, the browser asks for the files one at a time. On the ‘old’ HTTP1.1 protocol, this process takes ages …Read: "What is HTTP/2?"
Your website’s speed has an impact on almost every bit of “performance” of your website. Speed impacts rankings, it impacts conversions and average pageviews per visitor, basically, not working on your page speed means you’re losing money. Which is why we obsess about it and that is what we write about it in this section.