So what does this mean when you see 'This website is best viewed at 1024x768 resolution'?

Well, this is to do with how much of the page you see at once on your monitor screen. You may ask, "How do I know what my resolution is?"

Well, here's how to check your resolution and change it if you wish.

On your Desktop screen, the screen that your computer loads up to when you switch on, right click your mouse and choose Properties from the menu.
Click the Settings tab and look for Screen Area or Resolution. There will be many options here including ones like 640x480, 800x600, 1024x768.
So what we mean is, this website will look best if your Screen Area or Resolution is set to 1024x768.

DISCLAIMER!!!
If your computer is too old, it may not cope with a high resolution; it may crash. You should gain technical advice if you are unsure.