What is the meaning of sandbox?

Answer 1

The term sandbox is commonly used for the development of Web services to refer to a mirrored production environment for use by external developers. Typically, a third-party developer will develop and create an application that will use a web service from the sandbox, which is used to allow a third-party team to validate their code before migrating it to the production environment. Microsoft, Google,[citation needed] Amazon.com, Salesforce.com,PayPal, eBayand Yahoo, among others, provide such services.
source: https://en.wikipedia.org/wiki/Sandbox_(software_development)

Answer 2

Which context?

Answer 3

a virtual space in which new or untested software or coding can be run securely.