RAR is a compression format for computer archives. When an update or a software which requires multiple files is to be downloaded, it is very complicated and confusing to download each file one at a time. It will also take longer as you click on each download file one at a time or if download them all at once, it slows the download rate as you got multiple downloads going. Because of this, .rar was created to assist in download the file by bringing all the small files into one big file and all you have to do is download that big file and you got everything of that program in your computer. Sometimes this .rar file is also compressed so that it is smaller when you download it. The file's return to it's original size once you have extracted them.

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