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

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Some details:
 
Some details:
  
* '''<tt>__utmz</tt>''' tracks where a visitor came from (search engine, search keyword, link)
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* '''<tt>__utmz</tt>''' stores where a visitor came from (search engine, search keyword, link)
  
* '''<tt>__utma</tt>''' tracks 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 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). <!--
 
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 track 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.
+
* '''<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.
  
 
Also:
 
Also:

Revision as of 11:25, 31 January 2012

These are primarily notes
It won't be complete in any sense.
It exists to contain fragments of useful information.

These cookies are used by Google Analytics, primarily to track visits.

The cookies named
__utma
through
__utmz
are part of Google Analytics, originally by the Urchin Tracking Module, and also by the newer ga.js.


Some details:

  • __utmz stores where a visitor came from (search engine, search keyword, link)
  • __utma 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).
  • __utmb and __utmc 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 (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)