Vagrant is a “web development virtual environment” that generated instances of virtual system.
Personally, I have think many times of creating a web server that will match exactly web server profile, so there won't be any surprises after I upload a project on the web. I am also sure that every experienced web developer have encounter incompatibility issues moving project from local to production web server. Well, if you work only on one project tweaking your local host won't be a problem, but when you work on multiple projects, different changes may turn into nightmare and consume too much time.
How Vagrant Works?
Vagrant will set a virtual machine like VMware , VirtualBox, AWS, or any other. You get tools such as shell scripts, Chef, or Puppet, can be used to automatically install and configure software on the machine.
Consistent disposable environment without sacrificing any of the tools you're usually using like editors, IDE, browsers, etc... A great benefits for workgroups is that since somebody create Vagrant configuration file, this file can be copied on the systems of other developers – no matter you are working on Windows and other developer is working on Mac for example – same virtual environment with same dependencies.
Set-up might take an hour and there is a learning curve which might looks difficult for inexperienced developers. Vagrant is suitable for web developers, engineers and designers, as it save a lot of time on concentrating on your particular job.
One of the main advantages of Vargrant is ease of use in addition to large and well written documentation with great number of code recipes.
WebmaisterPro recomments Vagrant!
For more information visit official Vagrant website.