To create an Email Alert: Conduct a search by typing in a keyword and/or location and selecting what type of opportunity you're looking for (e.g. jobs, internships, etc.). Further narrow down your results with the filters listed on the lefthand side. When you're satisfied with the results you see, click the "Get Email Alerts" button to the right of the results.
To remove an email alert: Log in and click your name in the right hand corner the select "Personal Settings" from the dropdown menu. From the menu on the left, click Email Alerts. Select the "cancel" option next to the alert you would like to remove.