There’re a few general performance optimization recommendations, which will get you a decent result in Google PageSpeed Insights and other tools.

1. Enable Cache

Install and activate a caching plugin. We generally recommend WP Super Cache.

2. Enable CSS and JS Minification

CSS and JavaScript are static files. They will be loaded faster if they’re minified. It’s very simple to automatically minify them. Simply install and activate the Autoptimize plugin.

Go to the plugin’s settings page and enable the three options:
– Optimize HTML Code?
– Optimize JavaScript Code?
– Optimize CSS Code?

3. Improve Hosting Configuration

Ask your hosting provider to do the following for you:
– Enable gzip compression.
– Leverage browser caching.

If your hosting provider refuses to do so, it’s high time to consider changing your service provider.

4. Optimize Image Sizes

Optimize all your images with this Tiny Compress Images. This tool requires an active subscription and it’s free for the first 500 images.

If after all suggestions and practices from the ticket your website load time doesn’t improve then the issue is with your server and you would have to either change your hosting provider or upgrade your hosting package. Unfortunately, we can’t help you much with server optimization and configuration, it is on end-users to increase performance on their own and to make sure that they are using reliable hosting service providers with high resources, and with fast and secure servers.