It is a temporary visa where skilled workers are eligible to work and live in the regional area of Australia. You can also avail the opportunity of making a family visit in Australian. It can also be the first step towards taking Skilled Regional Permanent Visa with Subclass 887.
The three pathways to be a part of subclass 489 as follows
First is the formal invitation and sponsorship from Australia state or territory or any fellow relative with clearance with the points system and under the age of 45.
Next is if you have any of the visas from 475, 487, 495 or 496, you are eligible to take 489 provincial visa option
In case if any of your relatives holds visa subclass 475, 487, 489, 495 or 496, you might be eligible to take skilled regional provincial visa.
If you think you are fit among any of these categories, you can do more research on https://immi.homeaffairs.gov.au/visas/getting-a-visa/visa-listing/skilled-regional-provisional-489.