There are several ways you can improve the speed of your website, which can in turn improve your score on speed tests. Here are a few steps you can take:

Optimize your images by reducing their size without losing quality. This will make your pages load faster, especially on mobile devices.

Enable browser caching. This allows the browser to store certain resources locally, so that they don't have to be downloaded every time the user visits your site.

Minimize the use of large, third-party scripts and plugins. These can add significant weight to your pages and slow down the loading time.

Consider using a content delivery network (CDN) to deliver your content. A CDN stores your static assets (like images, CSS, and JavaScript files) on servers around the world, so that they can be delivered to your users more quickly.

Use asynchronous loading for your scripts. This means that the browser can continue loading other parts of the page while the script is being downloaded and executed.

Overall, improving the speed of your website can require a combination of different strategies. It's a good idea to run regular speed tests to see where you can make improvements, and to monitor the results of your efforts over time.

Use a lightweight, well-coded theme or framework for your site. This can make a big difference in how quickly your pages load.

Remove any unnecessary code from your pages. This can include things like unused CSS and JavaScript, or old, unused plugins.

Minify your CSS, JavaScript, and HTML. This means removing any unnecessary characters, such as white space, comments, and line breaks, to reduce the size of these files.

Enable gzip compression. This allows your server to compress your web pages and files, making them smaller and faster to download.

Use a web performance optimization (WPO) service. These services can help optimize your website's performance by reducing the number of requests made to your server and minimizing the amount of data that needs to be transferred.

Overall, there are many different ways to improve the speed of your website. The best approach will depend on your specific site and its requirements. It's a good idea to experiment with different strategies and measure the results to find the best solution for your needs.