When working with Eternity you will probably hear us talk about cache/caching, if we have directed you here then it is with the hope of explaining something which even we can struggle to understand at times.
Browser cache exists entirely because the internet, and your internet connection are slow. It's much faster to locate a file on your computer then having to fetch that same file from a server hundreds of miles away.
Modern browsers work faster and more efficiently by saving some of the data (images + files) to your computer from the websites you frequent often. This works great 99% of the time, because normally you would never notice cache.
However, in this particular case, when you're looking for changes to a website, cache can work against you. The best way to go about this is to follow the guides below for the browser you use to clear your browser cache.