The Big Five (also called Five Factor) trait model of personality is the most widely accepted personality theory in the scientific community.
The Big Five is so named because the model proposes that human personality can be measured along five major dimensions, each of which is distinct and independent from the others. The Big Five model is also sometimes called OCEAN or CANOE, both acronyms of the five personality traits.
In the Big Five model, people are understood to have varying levels of key personality factors which drive our thoughts and behavior. Although personality traits cannot specifically predict behavior, differences in the Big Five factors help us to understand why people may react differently, behave differently, and see things differently from others in the same situation.