Link popularity is
single most influential factor for determining how well a web site will perform in search engine rankings. A web site's link popularity is computed from
number and more importantly,
quality of links pointing to a web site.Link Popularity history
To gain a better understanding of link popularity it is useful to know why it became so crucial for search engine rankings. In
past a web page's ranking was determined, amongst other factors, by
number of keyword occurences within 'on-page' elements i.e. in page text, META tags, title tag. When web developers learned that they could trick a search engine to return their web pages by cramming keywords into their pages
search engines had to get a bit smarter. They were using 'on-page' elements to determine relevance so it was only natural that they would look to elements out of direct control of
web page creator i.e. 'off-page' elements. Search engines made
assumption that
greater
number of links from other sites pointing to a web site,
more popular
web site is and therefore a more quality resource. This worked nicely in theory but in practice it was also to be abused.
Web site owners figured out many ways to get links pointing to their web sites one example of which was through
use of link farms, pages
contained nothing more than a collection of links, Quantity of links was being abused so
search engines made use of
old saying "quality not quantity" and began to assign a quality factor to each of
links pointing to a web site. Now web sites that had a higher number of high quality links were looked upon favourably by
search engines. Building link popularity became a science in itself and today is still
most time-consuming and frustrating activity for a search engine optimizer.
Main classes of links
Note: In
following examples SiteA is our web site and SiteB is an outside site (i.e. a web site under a different domain name than SiteA).
Inbound links:
Inbound links to a web site are links that originate from an outside web site. An example would be a link on SiteB pointing into a page on SiteA.
SiteA (----- SiteB
Outbound links:
Outbound links from a web site are links pointing to a page on an outside web site. An example would be a link on SiteA pointing out to a page on SiteB.
SiteA -----) SiteB
There are two further classifications of links:
Reciprocal links:
An example of a reciprocal link is when SiteA links to SiteB AND SiteB links to SiteA,
link is reciprocated by both parties.
SiteA -----) SiteB
AND
SiteA (----- SiteB
To achieve a high link popularity
type of links to build are inbound one-way links. This simulates how natural links are created i.e. links that people create to point to your site because they found it worth linking to.