G Suite (formerly Google Apps for Work and Google Apps for Your Domain) is a brand of cloud computing, productivity and collaboration tools, software and products developed by Google, first launched on August 28, 2006 as "Google Apps for Your Domain". G Suite comprises Gmail, Hangouts, Calendar, and Google+ for communication; Drive for storage; Docs, Sheets, Slides, Forms, and Sites for collaboration; and, depending on the plan, an Admin panel and Vault for managing users and the services. It also includes the digital interactive whiteboard Jamboard  and the app development platform App Maker.
While these services are free to use for consumers, G Suite adds enterprise features such as custom email addresses at a domain (@yourcompany.com), option for unlimited cloud storage (depending on plan and number of members), additional administrative tools and advanced settings, as well as 24/7 phone and email support.
Being based in Google's data centers, data and information is saved instantly and then synchronized to other data centers for backup purposes. Unlike the free, consumer-facing services, G Suite users do not see advertisements while using the services, and information and data in G Suite accounts do not get used for advertisement purposes. Furthermore, G Suite administrators can fine-tune security and privacy settings.
As of January 2017, G Suite has 3 million paying businesses, and 70 million G Suite for Education users.