Web Usability, what is it? And how to improve it?!

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Google Analytics

Name	Purpose	Validity	Type
_ga	distinguish users	determined by the provider	HTTP
__utma	distinguish users and sessions. The cookie is created when the JavaScript library is executed and there is no cookie __utma. It is updated each time data is sent to Google Analytics.	determined by the provider	HTTP
__utmb	determine new sessions/visits. The cookie is created when the javascript library is executed and there is no cookie __utmb. It is updated each time data is sent to Google Analytics.	determined by the provider	HTTP
__utmz	store the traffic source or campaign through which the user arrived at your site. It's created when the JavaScript library runs and updated whenever data is sent to Google Analytics. It is updated each time data is sent to Google Analytics.	determined by the provider	HTTP

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Google Tag Manager

Cookie Name	Provider / Domain	Purpose / Function	Expiry / Duration
_ga	Google / gtag.js	Used to distinguish users for Google Analytics	2 years
_gid	Google / gtag.js	Used to distinguish users for Google Analytics	24 hours
_gat	Google / gtag.js	Used to throttle request rate to Google Analytics	1 minute

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