If you enable this, a new list will appear on the home page with the headling Your next action issues. This list will only be available to those users how can log in to this issuetracker. The list attempts to figure out what your next actions ought to be. The list is sorted by a score which is worked out depending on how the issuetracker finds that this issue is relevant to you. Here is a list of how it finds it relevant to you and how it scores each found issue.
If you are logged in, you will see this list related to you below: