Shift is a useful tool that will increase your productivity. On a single interface you'll be able to integrate your access to the different web services you use: social networks, instant messaging applications, online music streaming services, cloud storage, email, notes...
All your web service accounts now in the same place
For such purpose, you'll only have to sign up as a user with your email address and from there on you'll be able to add all your different accounts. The latter can be grouped according to the category which they belong to and thus all your online work can be organized much better.
The latter will prevent you from opening too many tabs in your browser or having to run different app instances at the same time, and you'll also receive notifications whenever there's an important update that may affect you, such as an email, a message or a notification.
It's compatible with all sorts of services: Slack, Trello, Gmail, Google Drive, Dropbox, Spotify, Facebook, WhatsApp… It's definitely a tool that will improve your productivity quite significantly. Although one thing is for sure: you'll need a premium account to be able to make the most of all its features and functions.