Is the window.GROWTHBOOK_CONFIG definition on clie...
# ask-questionsw
wonderful-xylophone-6904
12/07/2021, 6:50 PMIs the window.GROWTHBOOK_CONFIG definition on client side optional?
wonderful-xylophone-6904
12/07/2021, 6:50 PMi.e. I don't have Segment, Mixpanel etc. set up
wonderful-xylophone-6904
12/07/2021, 6:50 PMso assuming I should still be able to run my experiments
f
future-teacher-7046
12/07/2021, 6:52 PM
Without a tracking callback, the experiment would run, but you would have no way to know how it's doing.
future-teacher-7046
12/07/2021, 6:53 PM
GrowthBook does not do any event tracking and relies on you having some sort of analytics system set up already.
w
wonderful-xylophone-6904
12/07/2021, 6:54 PMok so it's the tracking JS which populates the db tables
wonderful-xylophone-6904
12/07/2021, 6:55 PMI hven't evern setup ab tracking before so apologize for basic questions
f
future-teacher-7046
12/07/2021, 6:57 PM
yes, that's correct. So if you are using MySQL for example, you would have code in your trackingCallback that adds a row to MySQL that includes a user identifier and which experiment/variation they saw.
future-teacher-7046
12/07/2021, 6:58 PM
Then, you would also need to add additional rows to MySQL for conversion events you care about. For example, when someone purchases something.
w
wonderful-xylophone-6904
12/07/2021, 6:59 PMmakes a lot of sense
wonderful-xylophone-6904
12/07/2021, 6:59 PMthanks, was wondering how does the app know anything about my data model
f
future-teacher-7046
12/07/2021, 7:00 PM
Event tracking is pretty hard to build yourself from scratch, so we recommend using a tool like https://jitsu.com/
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