Dialectal variation refers to the differences in language that occur within a specific language due to geographical, social, or cultural factors. These variations can include differences in pronunciation, vocabulary, and grammar. For example, speakers of American English may use different words or phrases compared to those who speak British English. This variation can also be influenced by factors such as age, ethnicity, and social class. In many cases, dialects can reflect a person's identity and community. Understanding dialectal variation is important for linguists and helps in appreciating the richness of human language and communication.