What is RAR/ZIP file?
A RAR file is a compressed file, or data container, that holds one or more other files and folders inside of it.
Think of a RAR file like a regular folder on your computer, where there are sometimes many other files and folders inside of it for the purpose of organizing them.
However, unlike a normal folder, a RAR file needs special software (for example, WinRAR) to open and "extract" out the contents.
A file with the ZIP file extension is a ZIP Compressed file and is the most widely used archive format you'll run into.
A ZIP file, like other archive file formats, is simply a collection of one or more files and/or folders but is compressed into a single file for easy transportation and compression.
The most common use for ZIP files is for software downloads. Zipping a software program saves storage space on the server, decreases the time it takes for you to download it to your computer,
and keeps the hundreds or thousands of files nicely organized in the single ZIP file.
Another example can be seen when downloading or sharing dozens of photos. Instead of sending each image individually over email or saving each image one-by-one from a website, the sender can put the files in a ZIP archive so that only one file needs to be transferred.