Learn SEO for WordPress, this an easy to understand WordPress beginner guide that will teach you how to optimize your website or blog for Search Engines like Google, Bing, Yahoo, Baidu, etc.
In the latest release of Chrome browser (76) , a new “loading” attribute that supports native lazy loading in the browser has been added.
An implementation for WordPress core is still under discussion. In the meantime, plugins that enable this for WordPress sites are starting to pop up, and Google has just released one of its own.