Change Before the change comes. (Smoke testing)

Smoke testing referred to the early stages of testing procedures/processes, where there is a need to test the entire application or Module just after construction, wrt the SRS/BRS and get ready to go further with other testing concepts.

Mainly smoke test is subjected to

• High level Functionality check
• Navigation check (where applicable) 
• Correctness
• Completeness
• Screen-shots

and then freeze the checkpoint OR ELSE back to the developer for further CHANGES according to the SRS/BRS

This is the post-production testing to make sure that nothing is broken while migrating the application code from QA environment into productions environment.

Smoke test is basically comes from the hardware industry when ever install a new system in new environment sometimes smoke will come.

Smoke testing is an integration testing approach that is commonly used when "shrink wrapped" software products are being developed. Smoke testing is the process of testing carried out to prove the application does not work. It is the initial level test. Also this is post-production testing to make sure that nothing is broken while migrating the application code from QA environment into productions environment.