Sure! I know exactly what you're talking about. The keys you're referring to are called special function keys. They are small buttons that run along the very top of the keyboard. Different keyboards have different keys, but the most common ones are an email button, a search button, a connect button (for the Internet) and a calculator button. Some even have a sleep mode function, a volume control right on the keyboard itself and multimedia keys.
These extra keys are nice to have, if you want to get into your email or use the calculator, for example, you can just hit that button one time and the program will pop right up on your screen. It's like your wish lies right at your fingertips.
If you've already been using the special keys, that's great and you should keep doing so. If you have the buttons, but don't know how to use them, you should refer to the software that came with your keyboard. Look through the manual as well and there should be instructions on how to configure the buttons so you can start to use them.
Every keyboard is different, so it's hard to tell you how to make these work without skipping over someone's model, but all the answers should be right there in your manual. Once you get them working, I don't think you'll ever want to stop. Check them out today!