UFC (Ultimate Fighting Championship) fights are divided into six levels. These are:

1) Preliminaries: This is a contest between two fighters who hope to be promoted to the next level.

2) Undercard: This is the first step on the main card, featuring generally unknown or lesser-known fighters.

3) Main Card: The main card is the main event of the night and features the most celebrated fighters.

4) Featured Bout: This is the introductory matchup for the main event, usually featuring top-level fighters but only lasting three rounds.

5) Championship Bout: These are the fights for a championship belt.

6) Superfight: These fights occur between the winners of two different weight classes and are considered the pinnacle of the UFC.