Pages having authority tag
For old search engines, link is almost all. But as the result of evolution of them, link is just a metrics of scoring. By getting high score in website content creation, your website can appear on SERP (Search Engine Result Page) without rich inbound links.
Weight of contents' score become higher
The status of website in search result is changed in around 2013. That means search engine changed their policy of scoring.
The Page-RankTM invented by google was algorithm focusing on popularity of the website. In this algorithm, a website with low Page-Rank cannot win ones with higher Page-Rank.
And the number of pages in a website was directly lead to Page-Rank, because existence of a page generate a Page-Rank value.
But the Page-Rank was disposed, and new word, which is the Authority Rank, was born. I guess the authority is score of summation of plus signals and minus signals. The external inbound link is one of them, and there are many other plus signals.
When the keyword "SEO" was born, most of topics about it was backlinks. But now a day, serach engines evolved so that they can evaluate web contents with other factors.
What is the Topical Pagerank
The Topical PageRank is extended Pagerank. The PageRank has nothing to do with the theme and topics about the contentns. It calculate only by the links network topology.
But the Toplical PageRank relevants to page theme deeply.
Thesis about Topical Pagerank
There is a thesis about testing Topical Pagerank. By reading it, we can know the feature about it.
Overview of the system
The keyword Tag function on CMS and Blog is effective tool to arrange articles. But it sometimes causes bad affect in SEO. That is because the Keyword Tag is a too effective tool, therefore it sometimes causes over optimization penalty.
Therefore currently I do not use keyword tags for main contents. I use them for blog contents. And half numbers of the tags are set as hidden. I use them in order to recommend suitable relevant blogs.
How keyword tags affect
Keyword tags are effective tool to build proper internal links. The internal links affects ranking and selecting page to show on SERP. Therefore if you use it correctly, the website can rank up. But if you use it incorrect way, search engines misunderstand the page structure and which pages are important page.
On good case, links from the keyword tags collect link values to the important pages. Then search engines can find correct important pages for keywords and the rank of the website goes up.
The pages which have outbound pages can increase authority rank by out bound links. Therefore both pages can go up in the ranking.
Google algorithm selects the page to show on the SERP before calculating total score for the theme.
Why I think so
Sometimes, most of you have found that, when the rank of google search result went down, the page shown on the result is different from before. After a while, it recover and the page also changed into last one.
Then the internal links to the first page are detected correctly.
I think that is because google algorithm select the page for each keywords or theme, and calculate the score after that.
This website experienced that
I do not use ranking checker for this website, but I'm checking it manually. Then I found the phenomenon occurs to my site.
After you created main contents as blog category, you have to write blog posts continuously. The main contents are to aim at middle keywords. By writing blog posts, you can generate traffic from search engines by long tail keywords.
Role of Contents
The website consists of 2 parts, they are main contents and blog articles.
Each part has own strong and weak points, and cover them each other. By this web structure, we can build effective internal links, and cover a lot of information by least number of pages.
Main contents are blog categories
Main contents pages are organized pages, and it works as blog category. But these pages have a lot of original information.