Besides the text itself, many things can be added to your document. Some of them were already created for you by the Word development team. You just need to use them. The insert menu allows you to add Page and Column Breaks, Page Numbers, and Date Time (in several formats). If you need Symbols which are not present in the English alphabet (such as Greek and Cyrillic letters, math symbols and more), you can use the Word symbols collection, accessible through Insert -> Symbol option.
You can create references throughout your document, making navigation easier – these include Captions, Table of Contents and more. Different Objects can be inserted as well – several of them predefined (Picture, Chart, WordArt) - and some are just common "objects" recognized by Word (such as Microsoft Equation). Hyperlinks can be added to your documents – either to a site, another file or just a certain part of your document.
If you are reviewing the work of others (or yours), you are invited to leave Comments – which can be easily seen by the creator.