The "Stop" button stops the rest of a page from loading. Think of it as a bit like a brake in a car - use it when you're loading a page but find you've come across a jam - either a traffic jam on the Internet, or you realise it's the wrong page, or there's some enormous graphic that will ages to download.

The "Refresh" button (also called "Reload" on some browsers) is handy if you've had to stop loading the page for some reason, and now want to reload it in its entirety. Or it is useful if you want to load the very latest version of a changing page. For example, the page might be one that's updated once a minute (e.g. it has a live picture from a Web camera, or the latest share price results). You can load the very latest version by hitting "Refresh".

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