Cache
A cache is a stored, ready-made copy of your web pages that loads much faster than building each page from scratch every time. Caching is one of the biggest reasons a website feels fast — or doesn't.
Also known as: caching · cached · clear cache
In plain English
Normally, every time someone visits your site, WordPress builds the page fresh — which takes a moment. A cache skips that work by saving a finished copy of the page and handing it straight to the next visitor. Think of it like a coffee shop pre-making popular drinks at the morning rush instead of starting each one from scratch. The result is a much faster site.
Why it matters for your business
Speed is money. Faster pages keep visitors from leaving, help you rank on Google, and make your whole site feel more professional. Caching is one of the most effective ways to get there. The flip side: sometimes a cache holds an old copy, so a change you made doesn't show up until the cache is cleared — which is why "clear your cache" is such common advice.
When it trips people up
If you update your site and don't see the change, the cache is usually showing you the old version. Clearing it fixes that. Set up well, caching is invisible and just makes everything fast.
Common questions
- I made a change but don't see it — what's wrong?
- Usually nothing's wrong — the cache is showing you a saved older copy. Clearing your site's cache (and your browser's) almost always makes the change appear. It's the most common cause of 'my edit isn't showing.'
- Do I need a caching plugin?
- Some form of caching, yes — it's one of the biggest speed wins available. Whether it's a plugin or built into your hosting depends on your setup; good managed hosting often handles caching for you.
Related terms
Run into this on your site?
Speed Optimization