Hi Dianna!!!
OK WIFI (802.11b is most common though Apple is going to 802.11g) Is to replace your networking wires (ethernet).
Bluetooth is to replace your cables (like your printer cable your keyboard cable, your mouse cable).
The cool thing about WIFI is that it can also be used as a bridge to the internet and alot of folks are setting up "rouge" wifi networks for free internet access...
Does that help?
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