I have produced many PR campaigns. These often (but not always) center around event marketing. 90% of a successful PR campaign or event is preparation: understanding your goal and what metric will measure success; knowning your media market vertical (whether that be traditional media outlets or influencers); and building those relationships. While skills transfer, each campaign is unique. You can pay someone a lot of money to buy access to a relationship, or you can build a relationship. The later is more cost effect, but requires rising above the incoming noise. Once channels have been identified, potential advocates within these channels have been identified, outreach has been made, and relationships have been established, if the campaign involved an event, this is yet another skillset.