What feature would you use to automatically fill cells with data based on patterns?

The feature that automatically fills cells with data based on patterns is AutoFill. This functionality is particularly useful for completing a series of data entries, such as dates, numbers, or even repeated text, where the user can drag the fill handle (a small square at the bottom right of a selected cell) across adjacent cells to extend the series.

For instance, if you start with a date like "1/1/2023" and drag the fill handle downwards, AutoFill recognizes this as a date pattern and will continue filling the cells with sequential dates (1/2/2023, 1/3/2023, etc.). This feature improves efficiency, allowing for quick data entry without the need for repetitive typing.

While Flash Fill also recognizes patterns, it is primarily used for manipulating text, such as changing data formats or extracting certain pieces from larger strings, rather than filling in a series of numbers or dates. Data Validation ensures that only certain types of data are entered into a cell, while Sort reorganizes data based on specific criteria. None of these options match the specific function of extending a pattern into adjacent cells like AutoFill does.