Thu Jan 10 12:02:44 PST 2019

used by search engines
the elements of a link used by the search engines as well as how
those elements factor into the weighting of links in the algorithms

through analysis of patent applications, papers submitted to
information retrieval conferences, and hands-on experience &
testing, we can draw some intelligent assumptions
Below is a list of
notable factors worthy of consideration
All of these issues, and many
more, are considered by professional SEOs when measuring link
Global Popularity
The more popular and important a site is, the more links from that
site matter to the search engines
Getting lots of local, topic-specific
links is great, too, but to earn trust and authority with the engines,
Local/Topic-Specific Popularity
search engine) suggests that links from sites within a topic-specific
community matters more than links from general or off-topic sites

Anchor Text
One of the strongest signals the engines use in rankings is anchor
text
If dozens of links point to a page with the right keywords, that
page has a very good probability of ranking well for the targeted
phrase in that anchor text
You can see examples of this in action
solely due to the anchor text of inbound links

TrustRank
In order to weed out massive amounts of spam (some estimate as
systems for measuring trust, many of which are based on the link
graph
Earning links from highly trusted domains can, thus, result in
a significant boost to this scoring metric

Link Neighborhood
In many papers on spam detection and information retrieval, using
the sites that link to a domain as well as the sites that domain links to
wise to choose those sites you link to carefully and be equally
selective with the sites you attempt to earn links from