Links are indeed among important factors in Search Engines’ calculations, but not the only one. Even so, Search Engines experts still allocate a vast share of Search Engines’ algorithm to contribute to link-based factors. Search Engines can recognize the prevalence of a site or pages through the amount and nature of pages connecting to them. Besides, they can likewise investigate measurements like trust, spam, and power through links. Trustworthy websites always has the tendency to connect with other reliable sites. In contrast, unreliable sites can scarcely add links from reputable sources to their link profile. Some SEO experts even suggest that links are a highly reliable way to determine the legitimate documents on a given subject.
Links signals that Search Engines use:
Before initiate any link building plan, you need to understand the fundamental elements of links used by Search Engines, as well as how those elements contribute to the evaluation of links in the algorithms. Search Engines use links in numerous distinctive ways. We cannot really know all the links qualities set by the Search Engines, through analysis of patent applications, years of experience and hands-on testing; we can draw some decent assumptions on what is going in the real SEO world. Below is the list of significant variables that SEO experts consider when measuring links quality and linking profile of any website.
TrustRank
Spams are unavoidable when surfing the Internet. Some even claims that the enormous figure of around 60% of the web’s pages is spam. In order to set aside this huge amount of irrelevant and useless content, Search Engines construct a systems mainly based on the link graph to measure trust. Websites’ owners can boost this scoring metric of their sites by getting links from respectable sites. Universities, government websites and non-profit organizations represent examples of highly trusted domains.
Link Neighborhood
Spams links are mutual. If a website links with many other spammy ones, it is most likely that website is also one of that itself. By looking at the big picture of all links around one website, Search Engine can form a general idea on the “link neighborhood” of that website. Hence, it is of critical importance that you pay attention to both sites you link to and those that try to link to you.
Freshness
"FreshRank," indicate the practice of Search Engines that use the freshness signals of links to judge the current state of popularity and relevance of one websites. Link signals tend to deteriorate over time. You cannot stay popular forever by the consistently unchanged pool of links no matter how valuable those links are. Thus, it's compulsory to keep on the good work and continue to gradually add more useful links to and from your website.
"FreshRank," indicate the practice of Search Engines that use the freshness signals of links to judge the current state of popularity and relevance of one websites. Link signals tend to deteriorate over time. You cannot stay popular forever by the consistently unchanged pool of links no matter how valuable those links are. Thus, it's compulsory to keep on the good work and continue to gradually add more useful links to and from your website.
Global Popularity
The website with higher popularity will automatically receive larger number of linking request to them. One of the most popular website on the Internet nowadays is Wikipedia, which attract literally 1000's of diverse sites linking to it. Linking to reliable sites and have links with trustworthy influencers may help you earn the favor of Search Engines. The general idea is the more popular the better.
Local/Topic-Specific Popularity
The concept of "local" popularity, first triggered by the Teoma search engine, suggests that links from sites within a topic-specific community matter more than links from general or off-topic sites. For example, if your website provides SEO expert services, getting links from reliable SEO forum would be much more helpful to rankings than links from off-topic like beauty tips sites.
Anchor Text
Anchor text is one of the outstanding signals Search Engines use in rankings. If a website has a huge number of web pages linking to with a specific keyword, that website has a higher chance in getting ranked well for that targeted keyword phrase in thet anchor text. You can see examples of this in action with searches like "click here", where many results rank solely due to the anchor text of inbound links.
Social Sharing
Nowadays, social networks such as Facebook, Twitter, and Google+, etc. have been enormously famous for a majority of the world’s Internet users from a wide range of age. People now use them as one of the man way to share links about their favorite topics. Search Engines have noticed this trend, thus treats shared links from those sites a little differently. There are ongoing discussions among SEO experts on how exactly do Search Engines treat those social links as, i.e. how they adjust their algorithms to that trend. However, we do know the rising importance of social channels.
Sources: References from several reliable SEO forums and websites.
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