There is a word turnover which is frequently used in business language What is the exact meaning of it?
In a business context, it's often used to refer to the "the rate at which employees leave a workforce and are replaced."
So if a company has high turnover, it means that its employees quit their jobs often, causing the company to increase hiring.
Google suggested another definition, "the amount of money taken by a business in a particular period," a.k.a. the gross revenue. I'm more accustomed to the former usage of the word than this one, but context will reveal what the author intended.