Can we do web automation without screen name?

I have noticed that screen name web automation in automation360. For example, if you record through recorder capture action a click on google.com, it would allow you to run the action if you use window title/screen name in variables.

I have tried removing the screen name and replacing it with wildcard as instructed here, but it did not work. Is there any way to do web automation without window title? If not then, what is the use of wildcard?