Hot spot for MacBook Pro

Hi everyone i am very new to this. i have been told by the Apple shop staff that you can set up an easy to use Hot spot and you can set up 10 of them? on my MacBook Pro. I was told how to set up one of these and played around with this one then set up one more. then i closed them two programs and went onto something else and when i tried to open the Hot spot item it just bleeped and said un activated and every where i looked to try and find out what i might have done nothing worked? if anyone has any experience with Hot spot and can help in any way i would be great full as i have been going round in circles. Thank you