An Electronic Signature is a digital representation of a person's intent to agree to the contents of a document or transaction. It serves the same purpose as a handwritten signature but is created and stored electronically, making it more efficient for online transactions. These signatures are legally binding in many jurisdictions, thanks to laws like the ESIGN Act in the United States and the eIDAS Regulation in the European Union. They enhance security and streamline processes in various industries, including finance, real estate, and healthcare.