"Visitor is returned" + "New Visitor" doesn't match "All visitor" in result pages
I just started using and learning Optimizely very recently. I am totally new. :-)
Sorry if I ask you something weird from now!
The thing I would like to know is the detailed condition and specification for capturing "All Visitor", "Visitor is returned" and "New Visitor" for Optimizely.
I know Optimizely is using 10 years Cookie for figure out unique user - but I would like to know more detailed infomation especially about how you guys separate "Visitor is returned" and "New User".
The reason why I'm asking this is because I found ["Visitor is returned" + "New Visitor"] doesn't match "All visitor" in my test result
For instance, according my test, I took a look at the count after filtering each visitor type.
All visitor : 3,720
Visitor is returned : 2,799
New visitor : 1,102
I am simply wondering maybe there is the duplicatied count or missing count between new visitor and returned visitor.... but it's just a wondering, I would like to make this clear.
If you have any specification document to help me to understand how you guys specify each visitor type, it'll be deeply appreciated.
Hey @Tammy ,
Welcome to Optimizely and the Optiverse Community! Really glad to have you on board for all your testing needs!
When a user first lands on your domain with the Optimizely snippet on the page, we drop a cookie onto their browser that holds a unique user ID. If the user does NOT have this user ID value when they initially land on your page, they are counted as a new visitor. If they land on your page and HAVE the user ID, they are counted as a returning visitor.
When interpreting results, a user may be counted as both a new and a returning visitor. For instance, if when entering your experiment, it is the first time they land on a page with your Project's Optimizely snippet, they will be counted as a new visitor. If this same user returns, they will be counted as a returning visitor. However, within the Results page for your experiment they will only count as 1 unique visitor. Filtering for both new and returning visitors will return a value of 1 for both filters, but the overall unique visitor count is still at 1. So the sum of the 2 filters should not equal the overall unique visitor count.
The key here is that they do not need to have been bucketed into the experiment, but rather have landed on a page that contains your project's Optimizely snippet. So if you have the snippet on example.com and example.com/page but the experiment is only running on example.com/page -- a user can land on example.com, receive the user ID value, exit their browser, then come back to example.com/page where your experiment is running, and they will be counted as a return visitor.
More on new and returning visitors can be found in our knowledge base article here: https://help.optimizely.com/hc/en-us/articles/2018
Manager, Technical Support