* Simple: I have a large collection of stamps from around the world.
* Descriptive: The museum's collection of Impressionist paintings is world-renowned.
* Figurative: The author's new book is a fascinating collection of short stories.
* Formal: The company's collection efforts resulted in a significant increase in revenue.
* Specific: The librarian helped me find a collection of books on ancient history.
The word "collection" can be used in many different contexts, so the best way to use it depends on what you want to say.