From the Nexis Uni homepage click on the "All Nexis Uni" dropdown and narrow by Content Collection and Canadian Cases
The Shepard's Citations Service or "Shepardizing" allows you to find additional cases that cite a particular case.
To Run a Shepard's Search type shep:[case citation] into the search box
Or if you're already looking at a case click on the Shepardize this document link in the lower right corner
Shepard's displays symbols to convey whether the case in question is good or bad law