Cache is basically a component used for storing data transparently for fast processing of requests. Data stored in cache can be the computed values or duplicates of original values stored somewhere else. If data is stored in the cache then requests are served simply by reading the cache which is comparatively faster. This tutorial explains you how you can enable cache for Gravatars of your WordPress site.
First install and activate NIX Gravatar Cache plugin. It is a simple WordPress plugin that activates cache for Gravatar in your Host and speeds up your site. After activation visit your admin area Dashboard ->Settings -> NIX Gravatar Cache and tick Activate Cache Gravatar.
- Makes your site faster!
- Makes fewer HTTP requests
- Reduces DNS lookups
- Enables avatars browser cache
- WordPress Network / WPMU support