When marketing using online tools and websites, companies will often track the cost-per-click and the cost-per-impression.

1. Define both terms and how they are useful to a company.
2. Make a chart of 3 digital marketing channels and use the calculations suggested in the book to  comparison between cost-pers.
3. Based on the chart, which channel would you select as the most cost beneficial to your company. Make sure to explain your reasoning behind your decision.