The 491 visa is a points-tested, 5-year temporary visa for skilled workers nominated by a state/territory or sponsored by a family member in a regional area. It leads to PR via the Subclass 191.
You Are Eligible If You Are
A skilled worker with an occupation on the regional demand list
Willing to live and work in a designated regional area of Australia
Nominated by a state/territory government or sponsored by an eligible relative living regionally
Assessed as skilled by the relevant assessing authority for your profession
Scoring at least 65 points on the skilled migration points test
Invited to apply through SkillSelect after submitting an Expression of Interest (EOI)
Meeting the health and character requirements of the Australian government