Employer sponsorship is one of the most travelled roads to PR, and it works, but it comes with a dependency worth understanding clearly. The typical shape: an employer sponsors your work visa, you accumulate the required years of continuous skilled employment, and that history becomes the backbone of a PR application, either through an employer nominated route or by satisfying residence and income requirements.
Responsibilities genuinely are shared. The employer must usually be an approved sponsor, pay at required salary levels, and keep the role genuine and compliant. You must maintain status, keep tax and legal compliance spotless, and archive the contracts and payslips the application will later need.
The risks concentrate in the dependency: if the job ends mid path, you often have a limited window to find another sponsor, and an employer's compliance failures can damage your case through no fault of yours. Choose sponsors with track records, know your window if employment ends, and pursue anything that reduces reliance on a single company.