The document discusses interjections, which are words that add emphasis or emotion to sentences. It provides examples of common interjections like "oh!", "ouch!", and "yikes!". It then presents a quiz where the reader must identify the correct interjection for sentences. Finally, it gives a practice section where readers must identify the interjections in sample sentences. The document focuses on defining and providing examples of interjections through explanations, examples, and interactive quiz and practice sections.