Every one of us spend ample amount of time in learning big topics of Spring & Spring Boot. For example, Spring Boot REST, Spring Boot MVC, Spring Boot Security and many more, but generally we don't think about 'How to handle Exceptions in Spring Boot?'. This topic might become the most important for running the application without any interference. Also, it is very helpful in making other developers understand our code flow easily. Even finding out the origin of errors & exceptions becomes very irritating, if we have not handled them properly in our code. Sometimes, we need to debug the whole flow of code to find it out & resolve accordingly. In this way, Exception handling plays an important role