Very few people will notice the difference, but it’s the kind of details that make Yahoo stand out — Yahoo is the company behind Flickr after all.
Yahoo Messenger is a tool for communicating easily with friends and family around the world.
You can chat in real time, make high-quality video calls, update your status, see your friends' updates, send SMS messages, and share photos and files instantly.
Yahoo ID: You can choose to use your Yahoo ID as your identity.
It display when you communicate in Yahoo Messenger.
In other words, Yahoo Messenger looks like Facebook Messenger, or We Chat, or Whats App, or Viber, or Line…