Cache is popular because of its meaning i.e. speed up. If you are using WordPress and you want that the webpage should work fast then Caching will definitely help you in speeding up your website. The faster a web page loads, the better the user involvement is. The rule of caching works is that it first generates a copy of your webpages and stores them in the server as static files i.e. as HTML documents. It then launch them into database queries. When the site visitor visit that particular page, the server allows them to read the cached page except the re-querying your database and vigorously generating it. In this way page response times with speeding up and possibly reduce the server resources required for generating and serving a web page.
Being a WordPress user, the best and reliable way to implement a caching system is by using a WordPress Plugin. Following is the best Collection of WordPress Cache Plugins 2014 that are recommended to our readers. Just scroll down and get to benefit yourselves from the advantages these plugins provide.
Plugin # 1: CloudFlare
Correct IP Address information for comments posted to your site
Better protection as spammers from your WordPress blog get reported to CloudFlare