Dialectal variation refers to the differences in language that occur based on geographic, social, or cultural factors. These variations can include differences in pronunciation, vocabulary, and grammar. For example, speakers from different regions may use distinct words for the same object, such as soda versus pop in the United States. These variations can also reflect social identity and group membership. For instance, African American Vernacular English (AAVE) is a dialect that has its own unique rules and expressions, showcasing the rich linguistic diversity within a language. Understanding dialectal variation helps in appreciating the complexity of human communication.