Text features are components of a document that are not part of the main body but help with navigation and understanding. They include things like titles, tables of contents, glossaries, headings, and diagrams. Text features benefit readers by providing clear organization, allowing easy navigation to specific topics, and presenting information in visual formats. They help writers effectively convey their message and ensure all important information is included. Overall, text features are useful tools that make both writing and reading educational texts more efficient and comprehensible.