For many young people, Facebook Messages have mostly replaced the functionality that Email is typically used for. It has also tied in the Chat/IM/IRC functional

For many young people, Facebook Messages have mostly replaced the functionality that Email is typically used for. It has also tied in the Chat/IM/IRC functionality with the integration with Groups, as well as getting people to sign up to send their SMS through Facebook Messenger. You can share files and photos. They have replaced a massive chunk of communication for a lot of people.