New Theme: Magma makes your WordPress site faster, smoother, and easier to manage.
In this video, I’ll show you how to boost your website’s speed and performance using the SiteGround Speed Optimizer, a free, all-in-one plugin developed by the experts at SiteGround.
This plugin lets you optimize caching, minify CSS & JavaScript, compress images, and improve Core Web Vitals without any complicated setup.
Even though it’s designed for SiteGround hosting (affiliate link), it also works on any WordPress site, making it a great option no matter where you host your website.
By the end of this tutorial, you’ll know exactly how to configure it for maximum speed and efficiency. Let’s get started!
To install the plugin, follow these steps:
Once activated, you’ll see a new Speed Optimizer page in your WordPress Dashboard.
Before we start setting up the plugin, let’s run a quick PageSpeed Insights test on my demo website.
This site is running my Magma WordPress theme, which is already highly optimized for performance and loads fast even without caching.
That said, caching is always a good idea—it helps reduce load times, improves Core Web Vitals, and ensures a smoother experience for visitors. Let’s see the current scores before applying any optimizations.
Now, let’s go through the settings and configure everything for best performance.
First, let’s start with the Caching tab.
If you’re hosting with SiteGround, you should be able to enable all three caching options:
There are a few extra settings under File-Based Caching, but most users don’t need to change these.
A short clean-up interval combined with preheating the cache can use more server resources than expected, so I usually leave preheating unchecked.
Next, let’s look at the Environment tab.
This setting automatically deletes unnecessary data, but use it carefully:
If you’re unsure, manually clean up your database instead of using automatic scheduling.
The Frontend Optimization tab is divided into three sections: CSS, JavaScript, and General Settings.
Now, let’s move on to the JavaScript tab.
For example, this test website runs on my Magma theme, which is very light on JavaScript—it has only two JS files and doesn’t rely on jQuery. In this case, combining JavaScript is completely safe.
However, if your site uses page builders or multiple plugins, you might see dozens of JavaScript files. In that case, it’s usually best to exclude the jQuery file from combination, as combining jQuery with other scripts can cause conflicts.
Deferring JavaScript files allows your page to load faster by delaying non-essential scripts. This is useful for improving performance, but it can also break poorly planned websites.
If you’re not a developer or don’t know how to test for issues, I don’t recommend enabling this setting. However, if you want to try it:
If everything works fine, you’re good to go! Otherwise, disable it or fine-tune exclusions.
Next, let’s go over the General tab.
Most of these settings are safe to enable, but two options require additional setup:
Let’s go through both.
This setting helps your website load external resources faster by resolving domain connections ahead of time.
Find a file hosted on an external domain (e.g., Google Tag Manager, external fonts, analytics scripts).
Repeat this for every external domain your site relies on.
Font preloading helps reduce layout shifts (CLS issues) and improves your PageSpeed Insights score.
Preloading works best with up to 3 fonts. More than 4 is generally not recommended but won’t cause major issues.
Focus on fonts that are visible above the fold (the first part of the page that loads).
For example, on my Magma theme, a standard page loads:
Since at least three of these are always visible at the top of the page, it makes sense to preload those fonts.
Now, let’s go over the Media Optimization settings in SiteGround Speed Optimizer.
I usually enable Image Compression at the Low level on most of my websites. This strikes a good balance between reducing file size and preserving image quality.
I also enable Lazy Load Media and remove all media types from the Exclude list. This ensures that images, videos, and iframes are loaded only when they come into view, which helps improve page speed.
Finally, I enable WebP image format, which reduces image file sizes without visible quality loss.
However, there are two things to be aware of before enabling this:
Now that we’ve finished configuring the plugin, let’s run another test in PageSpeed Insights.
Since my Magma theme is built for high performance, it already scores well without a speed optimization plugin. However, all websites benefit from caching and reduced page size.
After enabling WebP and caching:
Keep in mind that your results will vary based on:
It’s also worth mentioning again that this plugin works best on SiteGround hosting. I personally host all my websites with SiteGround, and most of my clients use them too because of their performance and reliability.
If you’re looking for a new hosting provider, consider trying them out. I’ve included my SiteGround affiliate link if you’d like to support my work.
That wraps up this tutorial! I hope you found it helpful.
If you have any questions about SiteGround Speed Optimizer or WordPress performance in general, drop a comment below—I’ll be happy to help.
Thanks for watching, and I’ll see you in the next one.
