Sharing files with others and sending them to other applications can be an important part of your business. To optimize these processes and save storage space, it's good practice to compress files. Instead of sending 10 separate files, sending 1 compiled file is faster and reduces filesize.
A zipped file is a compressed version of a file. Only File properties and Multi file properties can be zipped. You can pick the Zip event when building your action. This will allow you to zip and unzip files in your application.
You can zip files from (multi)file properties. The created zip will be available in the action as variable and can be saved later using a create or update event.
You can unzip a file from a file property to a (multi)file property. You'll have to set the operation to Unzip.