Canadian Citizensand permanent residents can bring their Parents and Grandparents to Canada as a Visitor under Super Visa, they can stay with you up to two consecutive years on their first visit without renew the TRV. Super visa can remain valid for up to 10 years.
The Super Visa is best option, why; because it is available round the year and has minimum income requirements compared to Canadian parent and grandparent program.
The Super Visa is popular because it helps the parents and grandparents to fly between their home to Canada without re-applying a TRV.