This will greatly reduce the chance of an unauthorized party having access to its content. Whatever your reason is for zipping a file, it is also important you secure their contents by adding passwords to them. This makes it easier to send them over the internet.
ZIP files are commonly used to reduce the size of folders or files.
You can use it to compress your files, split archives, for encryption, and lots more.
Zip files are useful in quite a number of areas.