"My dog, a fluffy golden retriever, loves to play fetch."
* "My dog" is the noun.
* "a fluffy golden retriever" is the appositive noun. It renames or identifies "my dog" and is set off by commas.
Here are some more examples:
* "My favorite author, Stephen King, writes horror novels."
* "The city of Rome, Italy, is known for its ancient ruins."
* "My sister, the one with the red hair, is a doctor."