What is Cache?

SEO and Marketing Terms: Cache

A cache stores copies of data, such as web pages or images, so they can be reused instead of retrieved or generated again. On the web, caches may be maintained by a browser, a website’s server, or a content delivery network (CDN), which is a network of servers that helps deliver website content. Cached copies can reduce load time and server demand, but they may also show an older version of a page until the stored copy is updated or replaced.

For example, a browser might save a website’s logo and reuse it as someone moves between pages, rather than downloading the same image repeatedly.

Why does caching matter in marketing?

Caching can help visitors access content faster. But outdated copies can create confusion: you might update a service page’s price while visitors still see the previous version.

Incorrect settings can also cause personalized information to be shared with the wrong visitors. Pages containing account details or other private content need appropriate caching rules.

What should you check?

If a published update isn’t appearing, first confirm that the change was saved and published. Then reload the page and check it in another browser.

If the old version remains, check whether your website platform, hosting service, or content delivery network has a cache that needs refreshing. Follow the provider’s instructions to clear the affected page where possible, then check the public page again. Clearing your own browser cache does not clear your website’s server or delivery-network caches.

Is a cache the same as a search index?

No. A cache reuses stored data. A search index organizes information about pages so a search engine can find relevant results. Refreshing a website’s cache does not itself update Google’s index.