system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does clearing browser cache fix a lot of website issues?
gpt
In the case of a web browser, sometimes temp files and cookies are not current, or even become corrupted.  Either way, if changes were made in the browser when trying to load, if the browser is attempting to use what is cached and it is conflicting with what the website currently has, then it can load screwy or not load at all.  So clearing it forces the the browser to load it as if it were visiting the page for the first time.

Also to note, sites that use a page count, such as newspapers who allow a limited number of articles to be read without a subscription, use cookies and temp files to show that this browser/pc has read x-number of articles, which would cause it to load that annoying screen prompting you to log in or subscribe.  Clearing the cookies removes that reference point.