Dialect groups are collections of people who speak a particular variation of a language, often influenced by geographical, social, or cultural factors. These variations can include differences in pronunciation, vocabulary, and grammar. For example, the English spoken in Britain differs from that spoken in America, leading to distinct dialect groups within the same language. Each dialect group can reflect the history and identity of its speakers. Factors such as migration, urbanization, and education can shape these dialects over time. Understanding dialect groups helps linguists study language evolution and the social dynamics of communication within different communities.