It must be useful. In the insurance business, you first need to know the aspects in which you are an agent. Insurance is roughly divided into property insurance, personal insurance, accident insurance and so on. Although there are many kinds, they are basically the same. Secondly, you can learn about the advantages of various insurances through insurance books, so that when customers ask you insurance questions, you can give targeted answers. Like when we were doing insurance in the past, we still need to keep learning the knowledge in books, so that you can give customers a satisfactory answer. Insurance is not like anything else. You can buy it when you don't need it and take it out when you need it. So you need to know all the insurance and its functions. Otherwise, the customer wants to buy an insurance product in the future, but you can't answer it. It makes you look unprofessional. Therefore, doing insurance and reading insurance books are our greatest help.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.