Personal Package Archives (PPA) are an easy to install and upgrade software on Ubuntu
Personal Package Archives (PPA) allow you to upload Ubuntu source packages to be built and published as an apt repository by Launchpad.
It saves you having to download and compile software if it isn’t available from the default Ubuntu repositories, it will also allow you (in some cases) to update existing software.
To easlity add a PPA to your list of repositories on Ubuntu Server, firstly you will need to install python-software-properties
sudo apt-get install python-software-properties
You can now add PPA’s using the following command
sudo add-apt-repository ppa:name-of-repository