Re: Whats the best way to Calculate ROI?
This is a very interesting question and I have to say the answer depends on what industry you are serving.
Normally the formula will be
(Revenue - AdSpent ) / Adspent *100
But this is one time calculation and in case of some industries like ecom it might not be entirely correct one as acquired customer ends up spending a lot more thatn 1st time purchase on ecom websites where you might want to consider analytics custom variables to track revenue from a particular customer over a period of time.
Hope this helps