When working with objects in JavaScript, it is common to need to push keys into them dynamically. There are several ways to achieve this, each with its own pros and cons. One of the simplest ways is to use the dot notation or bracket notation to directly assign a new key-value pair to the object. For example, obj.newKey = 'newValue' or obj['newKey'] = 'newValue'. This method is straightforward and easy to understand, but it may not be the most efficient if you need to push multiple keys into the object. Another approach is to use the Object.assign() method to merge one or more objects into the original object. This method is useful for combining multiple objects or adding new key-value pairs to an existing object. However, it does not directly push keys into the original object. If you want to push multiple keys into an object in a single operation, you can use the spread operator (...) to clone the original object and then add the new key-value pairs to the cloned object. Finally, you can also use the Object.defineProperty() method to define a new property directly on the object. This method allows you to specify additional property descriptors, such as whether the property is enumerable, configurable, or writable. When pushing keys into objects, it's important to consider the structure and requirements of your data. Choose the method that best suits your needs and ensures the integrity and readability of your code. By understanding these different techniques, you can effectively push keys into objects in JavaScript and enhance the functionality of your programs.