Varnish is a content caching platform, which is sometimes called a caching HTTP reverse proxy. It is a web accelerator that can increase the speed of a site by up to 1000%, based on its content. Anytime a visitor accesses any page on a website that uses Varnish, the platform caches the page and delivers it instead of the web server if the visitor opens it again. In this way, the browser request from the visitor is not handled by the web server and the page will load significantly faster, since the Varnish caching platform can serve data many times faster than any server software. The result is a much faster loading website, which means an improved browsing experience. If any of the cached webpages is updated on the live website, the info that Varnish caches in its memory is ‘refreshed’ as well, so the website visitors won’t see outdated content.