What's the main role of the general manager in the company?

Native speaker’s answer
Rebecca
"General managers," also known as "GMs" - singular "GM" - usually supervise the low-level managers and oversee the hiring and training of these managers and other staff. They're ranked below corporate-level executives. They also manage the operations budget and identify areas of growth. Ex: They want to hire a general manager, but you need a master's in business administration. Ex: The GM did some training with the managers this morning.