what is the difference between assignment and exposure? Which of the two is the trackingCallback sending? I'm confused when reading the documentation

Hey Andrea, sorry about the confusion. I think they're probably interchangeable in much of the documentation, but I'd be happy to see where our docs were confusing to try to clean them up. In my mind, an

exposure

should be the point at which your app is aware of a user's experiment

assignment

, and we should fire an

exposure  event

any time you look up a user's

assignment

. Firing this

exposure event

is what

trackingCallback

should do. But at the end of the day, a user being

assigned

to a variant is the same as them being

exposed

to a variant, so we could probably be more consistent in the documentation. In our SDKs, any time you look up an assignment using, for example,

isOn

or

getFeatureValue

, we should fire a

trackingCallback

before returning the result so that looking up a user's

assignment

always coincides with us firing an

exposure event

.

thanks it's much clearer now.