Caching, may speed up your WordPress site a lot but sometimes may also cause a lot of issues. If, after update, you met with weird issues or problems you never had before, caching could be the most possible cause.
If you use, one of the most popular hosting services for WordPress like GoDaddy, WP Engine or Site Ground, it is more likely you have caching enabled by default. In such case, you have to find the right button to purge cache under your WP dashboard. If you are not sure where to do this exactly, please contact with your hosting provider.
Cache plugins are what users choose most often. The most popular are W3 Total Cache, WP Super Cache and WP Rocket. Below, we describe how to clear cache using each plugin.