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Beginner's Guide on WordPress Caching & Why It Is Important

Beginner’s Guide on WordPress Caching & Why It Is Important

At present, most of you might already understand the importance to make your website load in the fast speed. To achieve the enhancement of this aspect, caching is an essential aspect. With it, the page loading speed can be improved to a large degree, which results in the better user experience and SEO ranking scores.

In this post, we’d like to come out a beginner’s guide on WordPress caching. With it, you can know how it works and why it is so important.

Definition about WordPress Caching

Actually, the terminology and the detailed technology for WordPress caching might be complex to understand. In this case, we’d like to use the real example to explain the underlying idea of it.

When people load your webpage to check the content, they need to send the server requests to your web host. These requests might include the CSS, JavaScript, images and may more. And then, your WordPress site will contact the database to fetch the corresponding page and the stored data. After that, your server will compile the data into the HTML page for returning to your readers.

The whole process may require seconds. The hosting quality of your web host and the physical distance to the server machine have a huge impact on the time consumption.

Now, the problem is that whenever people enter your site, they need to take time to go through these steps. If your webpages are content heavy and the web host is not that reliable, this can be a disaster.

With the WordPress caching, however, people who have already checked your site can get the static version of your web contents. This version contains the reusing date from their previous requests, which is exactly the HTML page that has been sent to the browsers of your readers. In this case, the next time people view your pages, they can load your contents quickly. After all, your server does not need to receive and process the requests one more time, but can send the prepared HTML page directly.

WordPress Caching

The Types of WordPress Caching

Actually, there are two main WordPress caching available. One is the client-side caching and another is the server-side caching.

For Client-Side Caching Option

You can also view this WordPress caching type as the browser caching. This is because this caching process will be handled on the web browsers of your readers. As researched, almost all the successful WordPress sites adopt this caching option and all the major browsers support it.

The idea behind the client-side caching is pretty simple. It is possible that your website contains plenty of data for images, texts, animations, CSS and many more. In this case, no matter which browser your readers use to check your site, the web browser will take a few seconds to download the files and HTML pages returned from your web server on the hard drive of the local computer. And then, the browser will not download your contents each time people load your pages. Instead, the stored information will be served to people automatically and promptly for the subsequent viewing.

Client-Side Caching

For Server-Side Caching Option

This option works in a similar way as the client-side caching. However, the difference is that all the caching process will be handled on your web server but not on the web browsers of your site visitors.

After enabling this caching mechanism, your server will not take time to process each server request. Instead, this machine will store the results of all the requests on the hard disk or the server memory. When the same request is made again, the machine will serve the results directly so as to make your site load much faster.

In addition, the server-side caching contains various caching protocols. They are the object caching, page caching, PHP code caching and database query caching.

Server-Side Caching

Cache or Not

Without doubt, the best thing you can enjoy from WordPress caching is that your page loading speed can be enhanced significantly. However, it is possible that you constantly update your website with some new posts and information. If so, can people check the new words properly and will the updated information be outside the cache?

In fact, most of the quality and properly coded WordPress caching plugins can handle this issue effectively. These great tools not only achieve the mechanism for storing the server request results. But also, they have the special function to empty the cache, and then, to generate the new version. This will happen automatically when you publish the new contents on your site.

Cache or Not

Enable the Function of WordPress Caching

If you are looking to speed up your WordPress site, one of the best and the easiest ways is to install the functional caching plugin. Among the available options, we highly recommend you to use the W3 Total Cache plugin or the WP Super Cache plugin. Both of them can turn on the WordPress caching function in the effective and comprehensive manner.


Susan Rose is a freelance writer who has a deep knowledge about WordPress. She loves everything related to website building since the freshman year at Christopher Newport University, and loves to share her experience with people all over all the world. In the daily life, Susan loves detective novels as it can train her logical thinking and creativity.