443f18ee_ndard_Metrics___Analytics_Talk__WAA_Definition
[Compliant] Yes [Term] Unique Visitors [GA Definition] Same as WAA Note: Google Analytics defines this term as Absolute Unique Visitors. A visitor is defined using a unique numeric identifier stored in the Google Analytics tracking cookies. This value is set when the visitor’s first visit is created. Each visitor is counted only once in the Absolute Unique Visitor metric, regardless of how many times they return to the site during the reporting period. [WAA Definition] 
The number of inferred individual people (filtered for spiders and robots), within a designated reporting timeframe, with activity consisting of one or more visits to a site. Each individual is counted only once in the unique visitor measure for the reporting period.
Google Analytics Compliance with WAA Standard Metrics - Analytics Talk
WAA Definition