What is the purpose of a Test Artifact in RFT?.

I am able to create a Test Artifact from the Navigator View by Right Clicking a project and
New->Other...->Test->Test Elements->Artifact

But I am not sure how to use it more effectively in my project.Can someone guide me regarding this.

I also see a Test Case Option when I navigate to the Test Elements folder mentioned above.

Is there a way to bundle test cases with appropriate test scripts.

Expecting for your inputs on this.

Thanks in advance