Meaning of day 0 in cohort analysis
I am trying to understand the meaning of day 0 in any cohort table.
Suppose I instrument a simple event "BUY NOW" for users who click on buy now on my website.
Now I want to figure out how many days does it take for a user to start buying on my website. For that I create my segment, choose users in the metric, and create an appropriate cohort.
Now I notice that the total users in the segment (first column in the table) is almost the same as week 0 numbers (or day 0 or month 0)?
This does not make sense. I am pretty sure it takes more than the 1st week for users to start purchasing.
What am I missing ?
Re: Meaning of day 0 in cohort analysis
Day 0 = Jan 30
Day 1 = Jan 31
Day 2 = Feb 01
Day 3 = Feb 02
Day 4 = Feb 03
Day 5 = Feb 04
Day 6 = Feb 05
Day 7 = Feb 06
See full article here http://cutroni.com/blog/2015/02/06/using-cohort-report/