Security concerns with PPA’s
There is always a risk that these third-party repositories may contain malicious packages having malware or adware which can be distributed through PPAs. Therefore we should always be careful while adding any random repository, as packages as these PPAs may or may not have been verified by Linux developers.
Using PPA in Linux
Personal Package Archives (PPA) is a unique software repository intended for non-standard software/updates. The PPA allows application developers and Linux users to create their own repositories to distribute software. It allows us to upload Ubuntu source packages to be built and published as an apt repository by Launchpad. With PPA, we can easily get newer software versions or software that are not available via the official Ubuntu repositories.