Usb Wireless Adapters.?

I know there are already similar questions to what I am going to ask but there is still things I am confused about so bare with me. I want to buy a laptop and have just found out about wireless usb adapters. Not entirely sure how it works though. I have a desktop computer with a router but it's not a wireless... show more I know there are already similar questions to what I am going to ask but there is still things I am confused about so bare with me. I want to buy a laptop and have just found out about wireless usb adapters. Not entirely sure how it works though. I have a desktop computer with a router but it's not a wireless router. If i get a laptop and use a usb wireless adapter will I get internet?
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