What is web caching?

Web caching is the activity of storing data for reuse, such as a copy of a web page served by a web server.

It is cached or stored the first time a user visits the page and the next time a user requests the same page, a cache will serve the copy, which helps keep the origin server from getting overloaded.

Web caching solutions and strategies enhance page delivery speed significantly and reduce the work needed to be done by the backend server.

Caching servers can be set to refresh at specific intervals or in response to certain events to ensure that the freshest content is cached (useful for rapidly changing information, such as breaking news or rapidly changing pricing).

Caching can also protect against total outages, delivering already cached content when servers are down.

The Varnish solution suite brings together subscription and service offerings that include powerful web caching.