4 different environments for software development team 

• Development environment
• Testing environment
• Staging environment
• Production environment

As we can see in the picture that development environment is for developers to build on their codes. Next the programs will then test by the testers and being fixed before launching to the production environment. 

Once the bugs have been fixed and all the relevant testing have been done, it then move to Staging environment and replicate the same version as production version.  Finally, the programs will deploy to production and ready for live. 

Picture from space0technology website.