Final answer:
Macros in Microsoft Word allow a user to record and automate a series of steps, simplifying repetitive tasks into a single command.
Step-by-step explanation:
The feature in Microsoft Word that allows you to simplify a series of steps into one command is called Macros. Macros let you automate repetitive tasks by recording a sequence of actions that you can then execute with a single click or keyboard shortcut. For instance, if you often need to capitalize text, insert an apostrophe, or perform specific formatting tasks, you could record these actions as a macro and save a considerable amount of time by running the macro instead of doing these steps manually every time.