Does hotspot use your cellular data?

So I'm kinda new to this, on my iphone I turned on the hotspot, so I can web search on my ipad where Wi-Fi is not available. So will the data used on my ipad count towards my cellular. Also if I have a 4gb plan, will it cost more to use the hotspot, I tried calling verizon, but couldn't get any help. So is hotspot unlimited and is the data usage the same, thanks.

Really? Verizon couldn't answer a question for you on your plan?

The data used on your iPad when connected to your phone's hotspot would take from the data limit your phone has.