Microsoft Word is a word processing program developed by Microsoft that allows users to create professional documents. It has tools for formatting, editing, and laying out documents. Some key features of MS Word include options for fonts, alignment, bullets, and more under the Home tab. The Insert tab allows users to add tables, images, headers, footers, and other elements. The Page Layout, References, and Review tabs provide tools for formatting pages, citations, and checking spelling/grammar. MS Word is commonly used for writing documents, creating resumes, and in education and business settings.