Difference between revisions of "Utma, utmb, utmz cookies"

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{{notes}}
 
{{notes}}
  
The [[cookies]] named {{inlinecode|__utma}} through {{inlinecode|__utmz}} come from websites that choose to use [http://www.google.com/analytics/ Google Analytics]. It's primarily used to track visits.
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The [[cookies]] named {{inlinecode|__utma}} through {{inlinecode|__utmz}} come from websites that choose to use [http://www.google.com/analytics/ Google Analytics] to see how they are being used.  
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It's primarily used to track visits.
  
 
The cookie names likely come from earlier versions, called the [http://www.google-analytics.com/urchin.js '''U'''rchin] '''T'''racking '''M'''odule, and are also also by the newer [http://www.google-analytics.com/ga.js ga.js].
 
The cookie names likely come from earlier versions, called the [http://www.google-analytics.com/urchin.js '''U'''rchin] '''T'''racking '''M'''odule, and are also also by the newer [http://www.google-analytics.com/ga.js ga.js].
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Some details:
 
Some details:
  
* '''<tt>__utmz</tt>''' stores where a visitor came from (search engine, search keyword, link)
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* '''<tt>__utmz</tt>''' stores whether the visitor came from a search engine, search keyword, or a link
  
* '''<tt>__utma</tt>''' stores each user's amount of visits, and the time of the first visit, the previous visit, and the current visit (presumably partly for double checking of this information). <!--
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* '''<tt>__utma</tt>''' stores the amount of visits (for each visitor), the time of the first visit, the previous visit, and the current visit <!-- (presumably partly for double checking of this information).  
 
domain_hash.unique_visitor_id.first_visit_timestamp.previous_visit_timestamp.current_visit_timestamp.visit_count
 
domain_hash.unique_visitor_id.first_visit_timestamp.previous_visit_timestamp.current_visit_timestamp.visit_count
 
-->
 
-->
  
* '''<tt>__utmb</tt>''' and '''<tt>__utmc</tt>''' are used to check approximately how long you stay on a site: when a visit starts, and approximately ends (c expires quickly). If you look at cookie state changes {{comment|(e.g. using [https://addons.mozilla.org/en-US/firefox/addon/6683 firecookie])}}, you will see these change regularly.
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* '''<tt>__utmb</tt>''' and '''<tt>__utmc</tt>''' are used to check ''approximately'' how fast people leave: when a visit starts, and approximately ends (c expires quickly). If you look at cookie state changes {{comment|(e.g. using [https://addons.mozilla.org/en-US/firefox/addon/6683 firecookie])}}, you will see these change regularly.
  
  

Revision as of 12:22, 9 October 2012

These are primarily notes
It won't be complete in any sense.
It exists to contain fragments of useful information.
The cookies named
__utma
through
__utmz
come from websites that choose to use Google Analytics to see how they are being used.

It's primarily used to track visits.

The cookie names likely come from earlier versions, called the Urchin Tracking Module, and are also also by the newer ga.js.


Some details:

  • __utmz stores whether the visitor came from a search engine, search keyword, or a link
  • __utma stores the amount of visits (for each visitor), the time of the first visit, the previous visit, and the current visit
  • __utmb and __utmc are used to check approximately how fast people leave: when a visit starts, and approximately ends (c expires quickly). If you look at cookie state changes (e.g. using firecookie), you will see these change regularly.


Also:

  • __utmv is used for user-custom variables in Analytics
  • __utmk - digest hashes of utm values (verify)