The `ForEach()` method is a function commonly used in programming to iterate over a collection, such as an array or a list. It allows developers to execute a specific action for each element in the collection without needing to write a traditional loop. This can make the code cleaner and easier to read. In languages like C# and JavaScript, `ForEach()` takes a callback function as an argument, which defines what to do with each item. This method simplifies tasks like processing data, transforming elements, or applying functions, enhancing code efficiency and maintainability.