Final answer:
The Excel feature designed to avoid repetitive typing is Autofill, which allows you to drag the fill handle to automatically fill cells based on patterns. Additionally, Flash Fill recognizes patterns to complete data, and Data Validation can create convenient drop-down lists.
Step-by-step explanation:
The Excel feature that prevents you from having to type the same thing over and over is known as Autofill. Autofill allows you to quickly fill in data in cells based on existing patterns or data. For instance, if you type 'January' in a cell and drag the fill handle (a small square at the bottom-right corner of the cell), Excel will automatically fill in the subsequent months. Another related feature is Flash Fill, which recognizes patterns in your data entry and completes the data for you after detecting a consistent pattern. Additionally, Excel’s Data Validation feature can be used to create drop-down lists that make it easy to select and repeat commonly used data.