Explanation:

Annotation is a term used in computer programming to refer to documentation and comments that may be found on code logic. Annotation is typically ignored once the code is executed or compiled. ... Thus, an annotation, or explanation, will be included within the code. Annotations are used to provide supplement information about a program. ... Annotations help to associate metadata (information) to the program elements i.e. instance variables, constructors, methods, classes, etc. Annotations are not pure comments as they can change the way a program is treated by compiler.