» The search engine marketing dictionary
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Co-founder of Google.
Since PageRank is widely bartered Google's relevancy algorithms had to move away from relying on PageRank and place more emphasis on trusted links via algorithms such as TrustRank.
The PageRank formula is:
PR(A) = (1-d) + d (PR(T1)/C(T1) + ... + PR(Tn)/C(Tn))
PR= PageRank
d= dampening factor (~0.85)
c = number of links on the page
PR(T1)/C(T1) = PageRank of page 1 divided by the total number of links on page 1, (transferred PageRank)
In text: for any given page A the PageRank PR(A) is equal to the sum of the parsed partial PageRank given from each page pointing at it multiplied by the dampening factor plus one minus the dampening factor.
Page Title (see Title)
See also:
- Directories such as the Yahoo! Directory and Business.com allow websites to be listed for a flat yearly cost.
- Yahoo! Search allows webmasters to pay for inclusion for a flat review fee and a category based cost per click.
Paid Link (see Text Link Ads)
Publishers publishing contextual ads are typically paid per ad click. Affiliate marketing programs pay affiliates for conversions - leads, downloads, or sales.
If a site is penalized algorithmically the site may start ranking again after a certain period of time after the reason for being penalized is fixed. If a site is penalized manually the penalty may last an exceptionally long time or require contacting the search engine with a reinclusion request to remedy.
Some sites are also filtered for various reasons.
See also:
- Google -30 rank penalty - an example of a penalty
See also:
See also:
- AdWords - Google's PPC ad platform
- AdCenter - Microsoft's PPC ad platform
- Yahoo! Search Marketing - Yahoo!'s PPC ad platform
Search spam and the complexity of language challenge the precision of search engines.
A page which has words near one another may be deemed to be more likely to satisfy a search query containing both terms. If keyword phrases are repeated an excessive number of times, and the proximity is close on all the occurrences of both words it may also be a sign of unnatural (and thus potentially low quality) content.
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