What is this? :C:\Recovery\Customizations\Apps.ppkg

In my root drive of my XPS 8900 I have this large folder:  C:\Recovery\Customizations\Apps.ppkg.

It contains 4GB.  I have searched around and found some people complaining that this folder is growing.  Mine is too new to tell. 

But what is it for?  I want to delete it since I am now operating on a relatively small SSD and really don't need extra needles folders here.