Super visa - parents and grandparents

• How does the parent and grandparent super visa differ from a multiple entry visitor visa?
• Is the parent and grandparent super visa a multi-entry visa?
• Who’s eligible for a parent and grandparent super visa?
• I need to calculate family size when applying for the parent and grandparent super visa. Who should I include?
• Can I cancel my sponsorship application and apply for a super visa instead?