Do The Math

In spite of the plaintiff cries of school children, there are times in life when you will use that stuff you learn in school — or at least should use it.

Case in point.   What if a certain organization is selling you 2000 ad views for $800 a month. Now 800 new customers for less than $1000 sounds great. Or does it?

Let’s assume a reasonable ctr (click through rate) of 2%. That means of the 2000 ad views you can expect 40 people to actually click the ad. That means that you are play a not very modest $20 for each new visitor to your website.

But wait. That is $20 per visitor, not $20 per new customer.  A visitor to your website is not automatically a new customer. In fact, of new visitors a significant number “bounce” from the page almost immediately. Let’s be pessimistic for the sake of easy math and assume that 50% of new visitors bounce when they hit the front page. That means we are now spending an even less modest $40 per visitor that doesn’t run away.

But wait. A visitor that doesn’t run away within the first 30 seconds is still not a new customer. Let’s go wild and assume that 1 out of three people that hang around on your website for more than 30 seconds convert and become new customers. That means that each new customer is costing $120.

So how attractive does $800 for 2000 ad views sound after doing the math?

This little tale illustrates two things.

  1. It is not easy to follow the trail of percentages from first action to final conversion.
  2. Promotion in this new world is not an easy nut to crack.