Can you explain what is meant by the term 'test thread' in software development and testing?

A test flow is a sequence of actions or a scenario executed to verify a specific functionality of software. It describes how a tester or automated test navigates through the application, what steps are performed, what data is entered, and what results are expected.

For example, a test flow for verifying login might include the following steps:

1. Open the login page.
2. Enter correct username and password.
3. Click the "Login" button.
4. Verify that the user has successfully logged in.

Test flows help systematize testing, ensure repeatability, and allow for the detection of errors at various stages of the program's operation.