A trope in literature is like a pattern or a theme that people use over and over again to help tell a story. It's like a recipe for making a cake. Just like how a cake recipe tells you to use flour, sugar, eggs, and butter in specific amounts to make a cake, a trope tells a writer to use certain things in a story to get their point across.
Some common tropes in literature are things like "love conquers all," which means that love is powerful enough to overcome any obstacle. Another trope is the "hero's journey," which means that the main character goes on an adventure and faces many challenges to become a hero.
Tropes are like tools that writers can use to help them create a story that readers will enjoy. But just like how you can make different cakes by adding different ingredients or changing the amounts, writers can create unique stories by adding their own twists to these common tropes.