What does the code snippet provided accomplish?

The code snippet successfully achieves the objective of adding a new key, "duck," with the value "canard" to the dictionary. In Python, when you assign a value to a key in a dictionary that does not yet exist, it will create that key and associate it with the specified value. This behavior is foundational in dictionary operations, allowing for dynamic updates and expansions of the dictionary as information is added.

By using the assignment syntax with a new key, you ensure that the dictionary includes this key-value pair, making it accessible for future operations. Consequently, this snippet enhances the dictionary's data structure by introducing new information without affecting existing pairs. Understanding this operation is crucial for effectively managing dictionaries in Python and utilizing their capabilities for various tasks, such as data storage, retrieval, and manipulation.