Population greatly influences a country's economy, with the increasing development of technology, developed and developing countries that have a population shortage do not need to worry about labor, they can ask for productive labor from other countries, and also use technology. Apart from the two above, developed and developing countries can also employ women to fill the shortage of slots in each employment sector.
The importance of population to a country is well understood in countries where the birth rate is falling and the number of working people is decreasing. Then those countries have to bring in skilled manpower from other developing countries to keep their country running. In the coming days, countries with high skilled youth population will be able to benefit more economically, as countries with low youth population will have no option but to hire skilled manpower from other countries.
Therefore, all countries will want to hire skilled people in the employment sector, as a result of which the skilled people of a country will make that country important to other countries in various ways. So the population of a country affects many things including the economy of that country.