Which provinces and states have more job opportunities in Canada?

Canada is basically a country with a small population compared to its large territory, so there is a high demand for foreign workers and immigration. In addition to these basic needs, population aging and consequent retirement of key economically active populations are another factor in manpower demand.

And the fact that these labor demand is higher in states with large cities such as Toronto, Montreal, and Vancouver rather than in areas with low population and industrial base is something that those who are considering employment or immigration to Canada should take a closer look.
Judging that it is easy to get a job and immigrate in a small city or a state with a small population while thinking about state immigration is not in line with the actual reality.
The Canadian local Korean newspaper article below contains these contents.

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Nearly 550,000 unoccupied jobs in Canada --- Labor shortage worsening
Employers can't find jobs, so they're competing for pay raises --- Reaching $21 an hour on average
(Toronto JoongAng Ilbo 2019.03.27)

Amid the worsening labor shortage in Canadian industrial sites, nearly 550,000 jobs are expected to remain unemployed across the country.
According to the Federal Statistical Office, there were 547,770 vacant jobs in the fourth quarter of last year (October-December), a 17% increase compared to the same period a year ago. It was also the largest number since early 2015, revealing that employers across all 10 major industries are struggling to find suitable jobs.

In this regard, economists pointed out that “even though the pace of economic growth is slowing down, it shows that the labor shortage is getting worse.”
An expert explained, “Despite the trend of sluggish exports and declining domestic demand, the number of workers needed is on the rise.”
“The number of vacant jobs has been on the rise for several years,” said an official from Toronto’s online job search site ‘Indeed.ca.’ In a recent related report, the Canadian Federation of Self-Employment (CFIB) said, "Over the past year, there have been 400,000 vacant jobs for more than three months." As a result, employers are known to be scrambling to raise wages.
As of the end of last year, the national average hourly wage was 21 dollars and 10 cents, up 5.2 percent over the past year. In Ontario, the increase was the highest in the country at 7.6%, and current hourly wages reached $21.85.

The federal government-affiliated Business Development Bank (BDC CANADA) said in a report in January that “53% of small and medium-sized businesses are experiencing a labor shortage,” and “this is why they are delaying business expansion.” "This eventually has a negative impact on the economy as a whole," the report said. "Many businesses are not accepting new customers." The report further emphasized that “the biggest cause is the mismatch between the manpower required by employers and the qualifications of job seekers.”
In particular, it said that as automation facilities are becoming more common across industries, one in 10 current jobs will disappear in the future. Accordingly, the Federal Liberal Government included measures to expand vocational training programs in the new budget announced on the 19th.