Varnish is a website accelerator platform, which caches data for the sake of quicker access. It’s sometimes referred to as an HTTP reverse proxy as well and it interacts between a web server and a web browser. When a visitor opens a particular web page, its content is requested by the browser, and then the web server processes this browser request and sends back the required data. If Varnish is activated for a specific website, it will cache its pages at the very first request and in case the user accesses a cached page once again, the info will be delivered by the accelerator platform and not by the server. The boosted loading speed is an end result of the much faster response time that the Varnish platform offers as compared with any server software. At the same time, this doesn’t mean that the visitors will continue seeing the exact same content again and again, because any update on any of the web pages is reflected in the content that the Varnish platform saves in its memory.