.RAR File Extension Description:

File extension RAR files are archives which contain one or more than one folders or files in compressed form.

These files are the products of software for file archiving and much like other popular archiving formats, this application uses lossless compression. This means that quality and size of the file and its contents do not change in any way during or after archiving. In the beginning, archiving was done for the purposes of reducing the amount of disk space required to store files.

Recently, hard disks have grown in size so the purpose has since changed.

Learn more about .rar files here: http://rar.file-extension-library.com/