After a build and before a release, smoke testing is used to check the software. Before critical testing, this form of testing identifies basic and critical faults in an application.
Smoke testing (also known as confidence testing, sanity testing, build verification test (BVT), and build acceptance test) is a type of preliminary testing used in computer programming and software testing to uncover minor flaws that would cause a prospective product release to be rejected.
Regression checks provide insights into software performance after some features have been modified or added, whereas smoke testing verifies the stability or fallibility of software before completing additional testing.
During the early stages of the software development life cycle, smoke testing is performed (SDLC). It guarantees that the program's essential functions operate in a unified and smooth manner. Before any functional tests, smoke testing is performed.