1. Establish 3 to 5 key stages that your relationship with your customer goes through.
2. This should start from first contact, include intermediate stages, and finish with your ultimate objective – e.g. “Purchase product”.
3. Arrange these stages into a linear process; 1, 2, 3, 4, 5
4. Research and establish how to measure and report the customer engagement at each stage.

That is your “Conversion Funnel”; you can now measure the % of customers that “Convert” from start to finish, and importantly you can monitor where you “Leak” customers along the way.