She is significant as she is part of the complex web of relationships in the movie. Her connection to Marsellus Wallace, a powerful crime boss, sets up many of the story's tensions and plot developments.
Mia Wallace is significant in 'Pulp Fiction' because she represents a certain type of femme fatale. Her charm and beauty draw in Vincent Vega, and their interactions lead to many key moments in the film, like the diner scene and the dancing at Jack Rabbit Slim's. She also adds an element of mystery and danger to the story.
The significance of Mia Wallace lies in her role in creating the mood and atmosphere of 'Pulp Fiction'. Her character is a blend of elegance and unpredictability. Her presence affects the decisions and actions of other characters. For instance, Vincent Vega is constantly on edge around her due to her connection to Marsellus. Her overdose incident is a major turning point in the movie, highlighting her importance in the overall narrative.