Extensions: How to create package file

Hi,
I am trying to test out my extension by manually downloading it via the extension manager. I am currently following this tutorial:
https://www.slicer.org/wiki/Documentation/Nightly/Developers/Tutorials/BuildTestPackageDistributeExtensions

Under testing, I was wondering what it means by "If you have built your extension then build the PACKAGE target to create a package file ".
I currently created the folder containing all the contents required for an extension (CmakeLists, modules, etc.) using the Extension Wizard. I was wondering how to build a package file from the folder?

Thanks a bunch.

I was wondering how to build a package file from the folder?

First, you have to build your extension. See How to build an extension ?

Then, you can generate the package building the corresponding target. See How to package an extension ?