Gmail is a free, web-based email service developed by Google. It offers 15 GB of storage, effective spam filtering, and robust search capabilities. Gmail supports multiple languages and allows users to send and receive emails, organize messages into folders, and customize their inbox. It also integrates with other Google services like Google Drive, Google Calendar, and Google Meet. Gmail’s unique features include the ability to undo sent emails, schedule emails for future delivery, and use Smart Compose for predictive typing. It’s accessible via web and through mobile apps for iOS and Android, making it a versatile tool for personal and professional communication.