Answer:
An archetype is a general role that many fiction stories, novels, or movies place their characters into. Archetypes include but are not limited to the protagonist, the mentor, the comic relief, the love interest, the emotion, etc.
There are many different lists assembled of different archetypes, and not all people agree on what archetypes should be included into the list.
Multiple archetypes may exist in one character, and multiple characters can make up one archetype. Including different archetypes can help to flesh out a story.