A license manager is a kind of software that helps you keep track of the different kinds of licenses that you need to buy and use for different types of software. It lets you keep track of the different licenses you have and when they expire, so that you don't have to worry about forgetting to renew one. It also helps you make sure you don't accidentally use a license for something that it's not intended for. All of this saves you time and money, and helps you make sure you're using the right kinds of licenses.