This message was deleted.

Hi Rajiv, thanks for reaching out. Only the

experiment_id

and

variation_id

keys are absolutely required in the trackingCallback. The

variation_name

is not required by GrowthBook for analytics purposes, but if you have a custom metric that relies on

variation_name

you should include that in the trackingCallback so that it gets sent to your data source.

sorry for the late reply. Thanks!