How do you think is it necessary to study to become a manager or it is better to obtain other profession and then if you dominate it you can become a manager without studying

What does content manager do? What is his work?

Those working as a manager have an increased level of job responsibility and are expected to help an organisation accomplish objectives and goals through the effective and efficient use of available resources. Persons in managerial positions often report to department heads or those in executive/senior-level positions and may oversee anything from a few, to several hundred other employees
These individuals are often assigned to a specific company function or department such as finance, sales, production, contracts, products, marketing and numerous other areas, and there are also those known as a general manager (GM), who oversee company operations as a whole
Salaries for managerial positions in the United Kingdom are dependant on the industry and specific post. GMs have an average figure of £33,000 per annum, though figures can be higher than £60,000 and as low as £25,000 per annum. Retail management personnel average around £25,000 per annum. Individuals managing sales departments see an average of just under £50,000, whilst for finance the figure is closer to £60,000.