What Is Caching?
Caching means temporarily storing a ready-made copy of something so it can be served again quickly, instead of rebuilding it from scratch every single time it is requested.
It matters because it makes websites and applications dramatically faster and cheaper to run. The trade-off is freshness — cached copies need to be cleared when content changes, which is why you sometimes need a "hard refresh".
An Everyday Analogy
Caching is like keeping milk in the fridge rather than going to the shop each time you want a cup of tea. It is right there, ready to use, until it needs replacing.
- Browser cache stores files on the visitor's device.
- Server cache keeps pre-built pages ready.
- CDN cache spreads copies worldwide.
- Database cache remembers common query results.
Why It Matters to You
Caching delivers big speed gains, but it explains some everyday quirks too.
- Much faster repeat visits and lower hosting costs.
- Sometimes a change "won't show" until the cache clears.
- We manage cache rules so updates appear promptly.
- A hard refresh forces your browser to fetch the latest version.
If you need a hand with any of this, your Progressive Robot delivery team is ready to help. Raise a ticket from the Support area of your client portal or speak to your account manager and we will guide you through the next steps.