Abstract Base Classes (ABCs) in Python are a powerful object-oriented programming technique used to enforce consistent interfaces across subclasses. By defining abstract methods that must be implemented by any subclass, ABCs ensure that these subclasses adhere to a specified interface, which aids in maintaining and extending codebases. The article discusses how ABCs are implemented using the abc module and the role of the @abstractmethod decorator in marking methods that need overriding. ABCs are commonly used in Python's standard library, as demonstrated by examples from the collections, io, and contextlib modules. While ABCs provide a structured way to define interfaces in complex systems, the article also cautions against their overuse in simpler projects. With the introduction of typing.Protocol in Python 3.8, developers have an alternative for interface enforcement, focusing on type checking rather than runtime checks. The text highlights the benefits of contributing to open-source projects like Pybites, which not only improve coding skills but also foster community collaboration.