to optimize a WordPress site for faster loading speed:
Use a caching plugin
This will ensure that your site is served faster by storing frequently accessed pages in cache memory.
Use a lightweight theme
A well-optimized theme will consider callouts and loading priorities, and often includes lazy loading.
Optimize images
This is an essential SEO factor that helps search engines crawl your site better. You can use the WP Smushit plugin to automatically optimize all images on your site.
Update to the latest PHP version
Each new version of PHP improves performance by running processes more efficiently and reducing memory usage.
Delete unused plugins and themes
It’s better to keep your plugins and themes up to date, and then delete any that you don’t use.
Enable GZIP compression
This compresses files on your site, which decreases the bandwidth and improves loading speed.
Use a CDN
A Content Delivery Network can speed up loading, support SEO, and change content access for customers.
To speed up a WordPress site, use a fast host, a lightweight theme, caching, image optimization, CSS/JS minification, GZIP compression, a CDN, and limit plugins.