Expanding its not clear

how expanding range it’s not clear and which algorithm is used?

could u tell time stamp in the video where this is being talked about

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.