I noticed that Ubuntu SDK recently had some updates and it installed a program named "Click". I would like to know what they are and how to use them.
Also, would they make Debian packaging easier?
Click packages are the new packaging format used in Ubuntu Touch, and by Ubuntu 14.10, on the desktop version of Ubuntu as well.
Some of the features they provide are:
Once you've packaged your app, you can submit your application to the Click App Store. The review process is vary simple and will be completeled usually within a few hours. Once reviewed, your app will be available for installation from any device runnign Ubuntu Touch.
Would they make Debain packaging easier?
Yes and no. Debian packaging is completely different. However, if your app is made with the Ubuntu SDK, you don't need to use Debian packaging and can instead use Click packaging, which is much easier to use and much safer for the end user.
Here are some useful links for more information:
The short answer is that they are packages designed to work better on mobile devices.
This is still VERY new and I'm going to wait awhile myself before I start using them (if I ever do).
Someone wrote an article on them awhile ago: http://iloveubuntu.net/click-package-012-landed-ubuntu-1310s-universe-command-line-initial-functionality