A web cache (or HTTP cache) is an information technology for the temporary storage (caching) of web documents, such as HTML pages and images, to reduce bandwidth usage, server load, and perceived lag. WikiPedia
A web cache is a hardware device or software application such as WordPress caching plugins for temporarily storing frequently accessed static content such as HTML, CSS files, and Images.
WordPress Caching Plugins are widely used by bloggers and developers to increase WordPress website speed.
W3 Total Cache and WP Super Cache are very popular, powerful and widely used advanced caching plugins, but there is a problem, they do not know when a widget or a menu is updated. You won’t be able to see your new changes.
You need to clear WordPress cache. It is very easy to clear Clear WordPress Cache Manually.
Clear WordPress Cache Manually – WP Super Cache
If you are using WP Super Cache plugin, login to your WordPress Dashboard. Go to Settings > WP Super Cache. Under Deleted Cached Pages section click on Delete Cache button.
You will be redirected to WP Super Cache Settings page. Under Contents tab, click on Delete Cache button. That’s all.
Clear WordPress Cache Manually – W3 Total Cache
If you are using W3 Total Cache plugin, login to your WordPress Dashboard. Go to Performance > Dashboard and click on Empty all Caches button.
That’s all you need to do to clear WordPress cache manually. It is very simple and easy.