Explain the three (3) pitfalls and how you would avoid them with specific examples for each

This question is about Web Design. Email campaigns, are still vibrant and active parts of company marketing and you as the web analyst may be asked to make sense of this data. One of the biggest pitfalls in web analytics is how to understand and deal with the data from these email campaigns. Explain the three (3) pitfalls and how you would avoid them with specific examples for each.