The fact that we can actually measure things in the digital world right now is shaky. Audience metrics typically estimate the number of eyeballs that may be obscuring any website linking to you. If The Daily Mail links to you your audience metrics will skyrocket. Why because the Daily Mail is a popular website. Did you sell anything as a direct consequence of it? Did it have any trackable commercial impact on your business.
That metric might still be relevant given expert commentary for media coverage. But in many digital PR cases this metric is mostly irrelevant because in those cases the story is just irrelevant to the business. Domain UK WhatsApp Number List Authority Domain Authority or Domain Rating metric aims to bring clarity to the murky world of link building. About ROI other than the fact that these numbers don't take into account the relevance of the link and the fact.
That they're just metrics taken in a broader context. If you get links from getting links in the long run this might be good news for you and cause for celebration. But how will you measure its value? Domain authority metrics cannot provide meaningful answers. The Average Domain Authority metric is even stranger. By the logic of average domain authority a campaign is obviously less successful if it has a natural series of low links in addition to high links.