Microsoft Word is a word processing program that allows users to create documents by typing text and formatting it. Word is part of the Microsoft Office suite and is commonly used to create documents, save them, print them, and share them electronically. The document provides instructions on how to open and work with a basic Word document, including how to insert text, pictures, tables, and headers/footers and how to format text using fonts, alignment, line spacing, and other tools. It also describes how to check spelling and grammar, undo/redo actions, and close a Word document.