Accelerated mobile pages https://en-gb.wordpress.org/plugins/accelerated-mobile-pages/
Remove javascript rendering block - https://blog.hubspot.com/marketing/remove-javascript-rendering-block#sm.0001o2vk4kvjsdhmwij2nj7q6ti7y
Google CDN setup https://colorlib.com/wp/load-wordpress-jquery-from-google-library/
# TN Expires Caching Start #<IfModule mod_expires.c>ExpiresActive OnExpiresByType text/css "access 1 month"ExpiresByType text/html "access 1 month"ExpiresByType image/gif "access 1 year"ExpiresByType image/png "access 1 year"ExpiresByType image/jpg "access 1 year"ExpiresByType image/jpeg "access 1 year"ExpiresByType image/x-icon "access 1 year"ExpiresByType application/pdf "access 1 month"ExpiresByType application/javascript "access 1 month"ExpiresByType text/x-javascript "access 1 month"ExpiresByType application/x-shockwave-flash "access 1 month"ExpiresDefault "access 1 month"</IfModule># TN Expires Caching End #It is would be good if you set expiry dates for a year. Less than a month or beyond one year is not recommended.
Save your WordPress .htaccess file and clear all the cache if you are using a cache plugin. That’s it, you are done.
Useful Tip:
Do you know that Gzip compression can also increase your website loading speed. Have you enabled it yet. If not, read another post on How to enable Gzip Compression in WordPress.
19 Plugins to Optimize WordPress https://www.wpmayor.com/19-plugins-optimize-wordpress/