Although the correct tagging of your campaigns seems something basic, there are still a lot of companies and websites that aren’t tagging at all or do it in a wrong way. This article explains the major tagging issues and how to tag correctly. The most important issue with tagging your campaigns is the involvement of many different colleagues and partners. More people involved means a bigger chance on errors. Even if all of your colleagues are tagging, it is unlikely that they all use the same notation. For example, email marketing can be described as e-mail, email, Email, E-mail or mail. If not everyone is using the same notation, Google Analytics will report multiple notations for the medium email marketing. This makes a correct way of analyzing the data more difficult. Get the full story at Search Engine Land