You can use it when you want to test a NEWLY DEVELOPED Force.com application or Visualforce PAGE. You can develop and test it in the Sandbox org INSTEAD of doing it directly in production.

This way, you can develop the application without any hassle and then migrate the metadata and data (if applicable) to the production environment. Doing this in a non-production environment allows developers to freely test and experiment applications end to end.

Types of SANDBOXES are:

• Developer
• Developer Pro
• Partial Copy
• Full

You can use it when you want to test a newly developed Force.com application or Visualforce page. You can develop and test it in the Sandbox org instead of doing it directly in production.

This way, you can develop the application without any hassle and then migrate the metadata and data (if applicable) to the production environment. Doing this in a non-production environment allows developers to freely test and experiment applications end to end.

Types of Sandboxes are: