In Google Analytics, you can see the number of people who have clicked a link associated with your email campaign. The information is in the Acquisition menu. Navigate to the Campaigns submenu:
If your campaign points to Web pages that people might find in another way, you can use the standard page content view to see the traffic to these pages--regardless of source. In the example below, the May 2015 IT Activity Report and the main IT Activity Report landing page received 246 pageviews: