The blog post says data gathered on email marketing campaigns might not be as useful as you think. "Real danger lurks in not measuring the right factors or not measuring accurately. You could suffer lost revenue. You might not know which messages are working. And your sales team won't know what to focus on."
There are just SO many different things you can measure in marketing (especially online marketing), that it's extremely difficult to agree upon industry benchmarks in order to make effective comparisons. People are focusing on impressions or clicks or only those clicks that lead to a single sale.
The purpose of any marketing is to trigger an ACTION. Actions could include:
- Forward to a friend
- Signing up for a mailing list or additional informaiton
- Visit to a physical store location
- Attend an event
- Buy a product