A signature is a person's handwritten name or a mark used to signify their identity and approval. It often appears at the end of documents, such as contracts or letters, to indicate consent or authenticity. Signatures can vary in style, from simple initials to elaborate designs, reflecting the individual's personality. In legal contexts, signatures hold significant importance, as they can validate agreements and transactions. Digital signatures, which are electronic equivalents, are increasingly used in online transactions to ensure security and authenticity. Both types serve the same fundamental purpose: to confirm that a person agrees to the content of a document or action.