What is the primary function of the Auto Fill feature in spreadsheet programs?

The Auto Fill feature in spreadsheet programs primarily serves to automatically fill a series of cells with data. This feature is particularly useful for completing lists or patterns based on the initial input. For example, if you enter a number or a date, dragging the fill handle allows the spreadsheet to recognize the pattern and extend it across adjacent cells without the need for repetitive manual entry. This streamlines the data entry process, enhances efficiency, and helps avoid errors that might occur with manual input.

While other functionalities, such as inserting images, formatting text and numbers, or creating charts, are valuable aspects of spreadsheet software, they do not represent the core purpose of the Auto Fill feature. Auto Fill specifically focuses on completing data entries quickly and accurately, making it an essential tool for users managing large volumes of information.