Object-oriented programming (OOP) is a programming approach based on conceptual "objects" and "classes". An object is a reusable blueprint for a physical or non-physical entity with descriptive and functional elements. Each instantiation of an object or class has different data. For example, an object defining a "person" can have a "name" field, but each instance of a "person" can have a different name.
Object-oriented programming helps create reusable pieces of code, making it a convenient option for complex projects.