Most importantly, a review of the application must determine that hiring a foreign national will have a positive or neutral effect on the Canadian job market. Further, the application must make it clear that no Canadian filled that position and had to offer this to a foreign national. To clarify, LMIA process varies depending on the wage of the position.
High Wage – wage above the provincial/territorial median wage is considered as the high wage.
Low Wage – wage below the median provincial/territorial wage is considered as low wage.
You can learn more about median wages for different provinces at the Employment and Social Development Canada website.