To extract zip files on Windows, you can either right-click the file and select "Extract All..." or double-click the zip file and then click "Extract All" in the File Explorer window. If you double-click, you will see the contents of the zip file in File Explorer, where you can then click "Extract All"

To extract a zip file on a Mac, simply double-click the .zip file. The extracted files and folders will appear in the same folder as the zip file