Hotmail.com was introduced by Microsoft as Outlook.com with more features like unlimited storage & ajax with interface closely related to Microsoft Outlook. Outlook.com provides integration with Calendar, Sky Drive, People and Skype. These integration and with added features, the users of Hotmail.com (now Outlook.com) has increased to 380 millions and still growing.
Simply, Social login is technology used by website to integrate social networking sites like Hotmail, Facebook, etc so that user can register to that website with existing social networking account. Due to the growing popularity of Hotmail email service among people in internet world, many websites prefer Hotmail social login to register user to their website. By using this social login technology, creating a account for website is much easier as personal information and contact details are already registered with Hotmail.com. So people can just use their Hotmail email account to register to new website. The recent integration of Skype boost Hotmail’s popularity even more. By all such means, Hotmail dominates social login as user do not have to fill registration form from scratch. With social login, the users do not have to maintain many distinct usernames and password for different sites. They can just simply use Hotmail account from where other needed information for website can be extracted.
Most of users still use Hotmail.com login account in online web stores like Amazon.com, Target.com, etc to get messages from those sites. Using Hotmail social login, the users can do rapid signup with existing credentials from Hotmail account. Many websites allow to extract contact details from user’s Hotmail email address that helps in easy communication as website can directly send messages to Hotmail inbox. Since these social sites authenticate users and generally do not allow multiple accounts, probability of false identities and spammers goes down. Its generally easy to sign up with Hotmail email address and many websites allow Hotmail social login to connect with them, its obvious that dominance of Hotmail for social login is likely to increase in future.