Factors that affect Google PageRank is:
A website that has a higher PageRank is assumed to have a better voice and influence the Google PageRank calculation, if we create a link on the website. In addition, the more other websites link will reinforce the value of PageRank. But sites that are banned will not be counted. Supposing, that the banned sites such as residents who lost their political rights.
The more closely the relevance of the theme from the links given by other websites getting better as you provide a deeper knowledge about these themes and this will make the visitors gave a good appreciation for your website.
Additional pages can reduce the value of pagerank of web pages. Perhaps the effect is the total PageRank of a page. But it might also just a few pages alone will decrease the value of google pagerank.
Pagerank value can go up also can go down, so when we have a PR 4 This does not mean forever be PR 4, this could also go down and could also rise. this is related to how we maintain our website PageRank value. To maintain the value of pagerank 4 we must be diligent to add links to other websites and frequently updated content.
Factors that could make the pagerank down:
• The lower the value of pagerank websites that provide links to your website.
• In Banned a website that provides a link to your website.
• Content that is rarely updated.
• Domain is not renewed.
• Illegal activity such as creating hidden text (which is not seen by visitors), pattern of deceptive redirects, and so forth.