What is the Dynamic Rendering recommendation?

How to generate an HTML snapshot?

Usually, snapshots are taken from a browser able to interpret JavaScript like the headless browser PhantomJS used in the past, or Chrome headless, or Firefox headless. You can also use any other desktop browser like Chrome or Firefox and control it with a tool like Selenium for example. The process of generating HTML snapshots is sometimes also called "pre-rendering".

SEO4Ajax is using regular versions of Chrome desktop to make HTML snapshots. It allows you to use the service without making particular tests to verify the compatibility of your website with SEO4Ajax.