If you are a Canadian permanent resident or citizen with a family member who wants to immigrate to Canada, you may be able to help them become a permanent resident. Family reunification remains one of the pillars of the Canadian immigration system. You are eligible to apply PR under this category if you are a-

Spouse, common-law or conjugal partner
Dependent child
Parent
Grandparent
Sibling, nephew, niece, or grandchild under 18 years who is unmarried and whose parents are deceased

Notably, the sponsor must agree to financially support their family member in the case that their relative cannot provide for their own needs. This is to ensure that the new permanent resident will not require government assistance. The length of this financial obligation depends on the individual being sponsored:
Spouse, common-law, or conjugal partner: 3 years
Dependent child: 10 years OR when the child reaches age 22 (whichever comes first); 3 years for a dependent child over age 22.
Parent or grandparent: 20 years

Note that this financial obligation does not disappear if the sponsored person becomes a citizen, divorces, or separates from the sponsor, or moves away from Canada.

For parents and grandparents’ program, sponsor must be 18 years old Canadian citizen or permanent resident and has enough money to support the family members as per the latest Proof of income requirement for the past three years. Once sponsor puts himself in the pool of candidates, if he gets an invitation to apply upon a random selection by IRCC only then a sponsor can apply online for their parent or grandparent’s Sponsorship followed by Permanent residence. Processing times can be between 20 to 24 months.