As you may know, Ubuntu is among the most popular Linux system because it has the PPAs, which are unofficial repositories hosted on Launchpad, that provide the latest software available, maintained by third party users.
But Canonical plans to replace the deb packages with snappy packages, a packaging format that comes to fix the dependency issues and to permit the users to easily install software on both Ubuntu Desktop and Ubuntu Touch.
Right now, the Launchpad developers are working to improve the repositories and to include snappy packages also, so that the PPAs don’t become obsolete after Canonical reaches full desktop-mobile convergence. While the snappy support is currently under development, Launchpad received the edit, administer and delete views feature for snappy packages, and Snap package owners can now request builds in the Web UI. Also, the blueprints on milestone packages have sortable icons again.