I'm currently needing to implement a 3rd party shopping cart and it has some Google tag manager tracking features such as events for when things happen. The thing I'm stuggling with is, if I don't have the ability to change the booking engine in any way, is there much point in measuring it?
I'm mainly wondering about what else is useful to track for optimisation possibilities. For instance it might be nice to know from a particular campaign where the drop off occurs. However, much outside of this I cant see much uses.
Would be really grateful for any suggestions.