The browser cache is where the Internet browser (Internet Explorer, Firefox, Chrome, etc.) store pages you have viewed. Then when you go back to a page previously viewed if the browser can display it more quickly using that stored version rather than waiting for page to be sent. Some pages are not stored in cache that change often like cnn.com
Cache is just a stored copy. Explorers and other people going in desolate areas would store supplies in the ground as went that they could get when returned and that was called cache, which is similar to the browser use.
Two problems occur because of the cache in the browser. The first is that when the web page changes you may not see the new web page for a while as your browser is using the cached version. It will after a certain time get a new copy. You can get a new copy by using the Refresh or Reload button. The second is that the cached copies use space on your machine and sometimes slow down operations.
It is easy to clear the cache in your browser.
In Internet Explorer, go to Internet options in Tools in the browser. Then choose Delete under Browsing History on main page. Click Delete making sure Browsing History selected. Click OK. The cache is cleared. Depending on how much in cache affects time to do the clearing cache..
In Chrome, click the menu button (has three parallel horizontal lines), choose History, then choose Clear browsing data, then click the Clear Browsing data button (You choose same thing twice). Then you can close the tab as the cache is cleared.
In Firefox, click the menu button (has three parallel horizontal lines), choose History, then choose Clear recent history, then I would change time to everything (you can just clear the most recent by using smaller time) , then click Clear now. The cache is cleared.