The advantages of WhatsApp is that it is a free messaging service that lets users send text, audio, video and images. It is also available on both Android and iOS, making it easy to use across different platforms. It is also very secure, with end-to-end encryption ensuring messages remain safe.

The disadvantage of WhatsApp is that unsolicited messages, or spam, can be sent out to users. The app also doesn’t have an option to block numbers, making it difficult to prevent unwanted messages. Additionally, the app requires an access to internet to be used, making it hard to use in areas without an adequate connection.