He has been a driving force behind effective and sustainable mechanical engineering solutions, with over 20 years of experience in optimizing HVAC systems and liquid cooling for data centers. A recognized leader, Bill has authored over 50 articles, presented at 50+ industry events, and contributed to initiatives with the DOE, EPA, ASHRAE, and The Green Grid, advancing energy efficiency in the data center industry.
Used to monitor number of Google Analytics server requests when using Google Tag Manager
1 minute
_gali
Used by Google Analytics to determine which links on a page are being clicked
30 seconds
_gid
ID used to identify users for 24 hours after last activity
24 hours
_ga_
ID used to identify users
2 years
_ga
ID used to identify users
2 years
__utmx
Used to determine whether a user is included in an A / B or Multivariate test.
18 months
__utmv
Contains custom information set by the web developer via the _setCustomVar method in Google Analytics. This cookie is updated every time new data is sent to the Google Analytics server.
2 years after last activity
__utmz
Contains information about the traffic source or campaign that directed user to the website. The cookie is set when the GA.js javascript is loaded and updated when data is sent to the Google Anaytics server
6 months after last activity
__utmc
Used only with old Urchin versions of Google Analytics and not with GA.js. Was used to distinguish between new sessions and visits at the end of a session.
End of session (browser)
__utmb
Used to distinguish new sessions and visits. This cookie is set when the GA.js javascript library is loaded and there is no existing __utmb cookie. The cookie is updated every time data is sent to the Google Analytics server.
30 minutes after last activity
__utmt
Used to monitor number of Google Analytics server requests
10 minutes
__utma
ID used to identify users and sessions
2 years after last activity
_gac_
Contains information related to marketing campaigns of the user. These are shared with Google AdWords / Google Ads when the Google Ads and Google Analytics accounts are linked together.
90 days
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