Visual Studio Online (VSO) is confusing term for many and seems like something related to development or IDE, but it’s not.
Probably because of its confusing term Microsoft has lately decided to change the name of service from VSO to VSTS (Visual Studio Team Services), now it’s better term and you can associate it with VSTF
What is VSTS (formerly known as VSO) ?
If you have ever come across TFS, then you can say VSTS is more advanced and cloud (SaaS – Software as a Service) version of the same.
Agile software development describes a set of principles for software development. In Agile development, requirements and solutions evolve through the collaborative effort of self-organizing cross-functional teams.
The Manifesto for Agile Software Development
In February 2001, seventeen software developers, among others Jeff Sutherland, Ken Schwaber, and Alistair Cockburn published the Manifesto for Agile Software Development, in which, through their combined experience of developing software they had come to values as follows.