In both cases the total PageRank in the site is 3 (the maximum) so none is being wasted. Also in both cases you can see that page A has a much larger proportion of the PageRank than the other 2 pages. This is because pages B and C are passing PageRank to A and not to any other pages. We have channeled a large proportion of the site’s PageRank to where we wanted it.
For any webmaster, it is important to know the rank of its web pages using a quality PR checker in order to maintain the health of its websites. One of the simplest ways to achieve that is to make use of some PR Checker tool. PR Checker is a tool that you can use to determine the significance of any webpage. It is one of the key factors that are used to determine which web pages appear in the search results and how do they rank. Keep in mind that the results of PR Checker can have significant influence on your overall Google ranking. This PR checker tool will help you to check page rank of any web page.

61. References and Sources: Citing references and sources, like research papers do, may be a sign of quality. The Google Quality Guidelines states that reviewers should keep an eye out for sources when looking at certain pages: “This is a topic where expertise and/or authoritative sources are important…”. However, Google has denied that they use external links as a ranking signal.

Lost IS (rank), aka “Quality Score too low” – Are your Keyword Quality Scores (QS) below 5/10? Per Google, since “Ad Rank” is a calculation of your Bid and QS, it would behoove you to improve Quality Scores by focusing on increasing CTRs in your Ads and Keywords. Improve CTRs by tightening up Ad Groups that only consist of closely related keywords and Ads that are the most relevant to these keywords.
Remember, depending on your targeting methods, the placement might not be that important. If you’re targeting the user through interests or remarketing, the placement is just where that user visits. Of course, some sites will still perform better than others, but keep in mind which targeting method you’re using when evaluating placement performances.
If we look at these other definitions of digital marketing such as this definition of digital marketing from SAS: What is Digital Marketing and Why does it matter? or this alternative definition of digital marketing from Wikipedia we can see that often there is a focus on promoting of products and services using digital media rather than a more holistic definition covering customer experiences, relationship development and stressing the importance of multichannel integration. So for us, the scope of the term should include activities across the customer lifecycle:
Webmasters and content providers began optimizing websites for search engines in the mid-1990s, as the first search engines were cataloging the early Web. Initially, all webmasters needed only to submit the address of a page, or URL, to the various engines which would send a "spider" to "crawl" that page, extract links to other pages from it, and return information found on the page to be indexed.[5] The process involves a search engine spider downloading a page and storing it on the search engine's own server. A second program, known as an indexer, extracts information about the page, such as the words it contains, where they are located, and any weight for specific words, as well as all links the page contains. All of this information is then placed into a scheduler for crawling at a later date.