Stylistic devices are techniques used by writers to enhance their expression and convey meaning more effectively. These devices include tools like metaphors, similes, alliteration, and imagery, which help create vivid pictures in the reader's mind. By employing these techniques, authors can evoke emotions, emphasize ideas, and make their writing more engaging. Common examples of stylistic devices include metaphors, which compare two unlike things without using "like" or "as," and alliteration, where the same consonant sound is repeated at the beginning of words. These devices enrich the text, making it more memorable and impactful for the audience.