Right-click and navigate to > Compressed (zipped) folder . macOS : Highlight the files you want to bundle. Right-click (or Control + Click) and select Compress . Mobile (iOS/Android) : Open your Files or File Manager app.
For developers, zipping PDFs is often handled programmatically: How to Make a PDF a Zip File | Adobe Acrobat Pdf zip
Zipping PDF files is the process of bundling one or more documents into a single compressed .zip archive to reduce file size and simplify sharing. Right-click and navigate to > Compressed (zipped) folder