Remarketing List: Audience by Analitics Vs Remarketing List by Adwords
I am a new user of Analytics and Adwords, so excuse me if I'm doing a stupid question.
I have a "problem" with the dimension of audience list created by Analytics.
In particular, I have the audience list "All visitors" (that is created automatically at the first audience list set) with the following options:
- Memebrship duration: 30 days
- Lookback days: 7 days
and the users over last 7 days are 57438.
But if I see data of last 7 days from the reporting I have 59515 New Users and 67819 Users.
Moreover if I check the "Display audience size" is 170k but in seeing the reporting of the last 30 days, I have 227k New Users and 245k Users.
So, why I have a discrepancy from the audience list and reporting?
Another big doubt that I have, is about the Adwords remarketing list "All visitors". In fact if I see this list (30 days membership duration), I have 290k dislpay audience size. So it is different both the audience list and the reporting data. Do you know why?
What is the correct list to utilize?
I focused my attention also about the meaning of lookback days setting in the case of "All visitors". With the setting above, I should have the users that passed on the site in the last 30 days or 37 days?
Thanks to all
P.s.: all lists are active from Apr '16