Microsoft Word allows users to write documents through various components and functions. It can be opened from the desktop or start menu by selecting a template or blank document. Documents can be saved by going to File > Save and selecting a location and file name. Common shortcuts include Ctrl+B for bold, Ctrl+X for cut, Ctrl+C for copy, and Ctrl+V for paste. Headers display information like page numbers and dates at the top of pages while footers display this information at the bottom. Mail merge allows creating personalized letters or labels by merging a database with a template document. Formatting options include setting line spacing, adding columns, and formatting paragraphs.