WhatsApp is a cross-platform instant messaging app that allows users to exchange text, audio, and video messages, as well as make voice and video calls over the internet. It was developed by WhatsApp Inc., a company that was later acquired by Facebook.
WhatsApp is available for smartphones, tablets, and personal computers, and can be downloaded for free from app stores or the WhatsApp website. It is one of the most popular messaging apps in the world, with over 2 billion active users.
To use WhatsApp, users need to have an active internet connection and a phone number. They can then create a WhatsApp account by downloading the app and following the on-screen instructions. Once they have an account, users can add contacts and start messaging or calling them.
WhatsApp also offers a number of additional features, such as the ability to create group chats, share media and documents, and use end-to-end encryption to ensure the privacy of messages and calls.
Overall, WhatsApp is a convenient and user-friendly messaging app that allows users to stay in touch with their friends and family, no matter where they are located.