Parents and grandparents of Canadian citizens or permanent residents who have been found admissible to Canada and meet some other conditions are eligible for the Super Visa as stated by Canadian Government. Visa officers consider several factors before deciding if the person is admissible. This means they are a genuine visitor to Canada who will leave by choice at the end of their visit. Among the things that could be considered are:
The individuals strong bonds to his/her home country
The purpose of their visit,
The individuals family and financial state of affairs,
Invitations from Canadian hosts.