The importance of various metrics and how these factors influence your website's ranking in the search engine results is an essential part of boosting your site's ranking. Factors, such as PR, MOZ rank, domain authority and page authority are certainly important; however, another important metric is Trust Flow. Here's how these factors can influence SERP results.
Google Page Rank
Relevant links from high authority websites can influence page rank. These links can help a site rank, but it is only one factor of many that must be considered.
Moz.com introduced Domain Authority as a measure of 3 factors, domain size, popularity and age. The higher this number, the more credibility the site has. Credibility is determined by the number of quality links pointing to a page or site. A popular website with numerous outside links as well as excellent interlinking will typically have greater credibility. This domain authority score is important for ranking with Google.
If you have spent any amount of time in the link building world, you will note that it takes some serious time to really rally up and start gaining some momentum in the search engines and start to see things pick in terms of where you are ranking in the SERPs.
This is especially true with very competitive keyword phrases. Jumping from page three to page two, and from page two to page one can be very tough in a competitive niche - even when you are link building at a very high scale (however jumping from - say - page eleven to page eight is considerably easier).
Link building and Relationship management (sometimes public relations is a part of it) software is supposed to help you keep track of these relationships. With it, you are able to build a humungous database of contacts, and you are able to keep track of where all your links are coming from.
In an article I have previously written on this website, I describe the benefits of using a system like this. The particular software I was talking about in this case was called Buzzstream, and you can find that article here.