How often do the serps update, and are related links counted as a higher vote then what non related link is? if so how can i tell what google considers a related link, would they consider seo related to website design, or graphics design related to website design, or web hosting related to website design? how does that work, or is there any way of telling, and do the serps update all the time? I mean when they start finding out you got backlinks, does the serps usually boost up soon as they find the backlinks?
nobody can tell how exactly how 2 websites are related since it was machine who validate that and not human. but you can observe that through the use of some tools. e.g https://adwords.google.com/select/KeywordToolExternal , overture, and even your google webmaster tools. also the frequency of targeted keywords/phrase from backlinks page helps.
ohh yea the webmaster tools on the page rank, how often does that update? under statistics crawl stats it shows page rank high medium low? does that update all the time, and once the low bar gets filled up all the way does the medium bar start to fill up?
google webmaster tools-> well it was more than just that. it also help you realize what to impove in your contents. https://adwords.google.com/select/KeywordToolExternal => it helps you realize the relevancy of one website or target keywords/phrase to your website.
The webmasters tool, just like the google toolbar pagerank, is only updated every once in a while. Neither seems to be related at all to the speed of updating and crawling of the google bot and search engine.