List merging is the process of combining two or more lists into a single list. This can be useful in various contexts, such as data management, where you might want to consolidate information from different sources. The merged list typically contains all unique items from the original lists, ensuring no duplicates are included. In programming, list merging can be achieved using different methods, depending on the language used. For example, in Python, you can use the `extend()` method or the `+` operator to combine lists. This technique helps streamline data handling and improves organization in applications like databases or spreadsheets.