Users are bucketed in variation A or B or N at the beginning of a session and if she or he is exposed to one or multiple campaigns that belong to a given variation, his session is analyzed & reported in reporting view for the relevant variation.

Nosto remembers how users are bucketed and will be provided with the same experience of variation A or B or N in any upcoming session. 


  • On the 1st of February, one user visits an online store with a Nosto test running. He is bucketed in variation B and served by the relevant campaigns of that variation when she or he visit a page type where one campaign of a variation is displayed. She or he leaves and doesn't purchase. 
  • On the 4th of February, user revisits the website and is bucketed to variation B. She or he is exposed to the campaign(s) of the variation B and convert. Nosto reports the conversion corresponding to the variation B. It is a converted visit. 

Note that if in the second visit, the user wouldn't have been exposed to any campaign of the variation B, it wouldn't be stated as a converted visit. Indeed, the relationship between the experience and the conversion would not be strong enough.

Campaign reach and attribution 

It's quite common that within a session, the campaign(s) of a variation are displayed multiple times for a single user. This is particularly the case when users are visiting multiple times one same page type. Nosto tracks the performance of the campaigns and the performance of the variations differently. 

If a user is exposed to at least one campaign of a variation and convert, it counts as one converted visit for the variation. However, if she or he has viewed 4 times the campaign of a variation, the campaign reach is 4 and will be reported as such on the campaign listing view in Nosto. 

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