判断反向链接质量高低的标准 - Ethan导读
作者:佚名 来源于:中国营销策划网
link text - LINK TEXT
title text -
header text -
HEADER TEXT
These important context elements are said to qualify the links on a page and are often called keyphrases - not to be confused with this term's standard SEO industry use as a phrase which forms (part of) a search engine query. To avoid this confusion, I will refer to this non-standard use as reputation keyphrase. They determine the semantic, or thematic, sphere of influence of the backlinks they govern. Title text governs all links on a page. Header text governs all links until the next heading of the same or greater importance. Link text only governs the URL with which it is associated.
Consider the following snippet of HTML pseudo-code with three links and accompanying context, reputation keyphrases, marked as RKP:
Header 1 - RKP2
.
blah blah blah Link Text1 blah blah blah
( Where "URL1" Link Text1 marks RKP3 )
.
blah blah blah Link Text1 blah blah blah
( Where "URL1" Link Text1 marks RKP3 )
Header 2 - RKP4
.
blah blah blah Link Text2 blah blah blah
( Where "URL2" Link Text2 marks RKP5 )
.
blah blah blah Link Text2 blah blah blah
( Where "URL2" Link Text2 marks RKP5 )
Header 3 - RKP6
.
blah blah blah Link Text3 blah blah blah
( Where "URL3" Link Text3 marks RKP7 )
.
blah blah blah Link Text3 blah blah blah
( Where "URL3" Link Text3 marks RKP7 )
In the above example, the following qualification relationships hold:
RKP1 qualifies URL1, URL2 and URL3
RKP2 qualifies URL1 and URL2
RKP3 qualifies URL1
RKP4 qualifies URL2
RKP5 qualifies URL2
RKP6 qualifies URL3
RKP7 qualifies URL3
The strength of reputation keyphrases is also considered. The typical factors considered are the density of the SEO keyphrase within a reputation keyphrase, offset of the SEO keyphrase within a reputation keyphrase, and how many terms within the SEO keyphrase appear in a reputation keyphrase. Furthermore, when calculating the context of backlinks, title text is weighted more heavily than header text which is weighted more heavily than link text.
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