ZIP files can be encrypted, which means you can password-protect sensitive data before sending it via email or uploading it to the cloud. Dropbox.com When to Use ZIP Files What a ZIP File Is and How They Work - Dropbox.com

ZIP files are used primarily for three reasons: compression, bundling, and protection. File Compression (Reducing Size):

A ZIP file ( a popular archive file format that acts as a container, holding one or more files or folders in a single, compressed package

They allow you to take many different files—such as a folder full of photos or documents—and turn them into a single, cohesive file. This is much easier to manage, copy, or move than hundreds of individual files. Easier Sharing:

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