Lazy load images & videos in order to reduce the size of a web page request considerably and improve site speed overall.
We introduce Sitelinks Breadcrumbs, Searchbox, and Menu, improving site speed, configuring HTTP/2, and adding and testing HTTP Strict Transport Security headers to a website.
Article focuses on helping novices with how to assess the current speed of their website along with some tools that can be used to accomplish this task.
Search Engine Optimization improvements can be achieved from valid document structure + excellent content + relevant keywords (in particular, long-tail keywords) + fast page load time (note that backlinks are not covered in this article).