Site's speed is a highly important factor for a WordPress website. Excessive load times harms our website in many ways. It not only decreases our site's sped but also reduces the number of visitors on our site. Reduced page speed leads to reduced visitors and this, in turn, affects the ranking of a website. Caching refers to the process of storing data in a cache. A cache is a temporary storage i.e. when a site is cached, it means the site's pages, images, files etc, are stored on the user's local drive.