Here at BuyWinRAR you can download WinRAR and learn how to use the program and buy a license for the software. WinRAR is a software application that can be used to compress data (to create RAR or ZIP files) and extract compressed files. You can try WinRAR 40 days for free.
A compressed (zipped) folder is a folder with the contents compressed using a codec, reducing the file size. a zip folder/file is basically a collection of other folders and files that have been compressed in size using a codec. Think of it as being a briefcase and the contents of it has been vacuum packed to squeeze as much as possible in there.