Am I paying for the lte on my iPhone?

I noticed that when I'm not on Wi-Fi at home or at a friends house I'm still connected to the Internet and in the are where it would show Wi-Fi it says LTE. Is this Internet? And if so am I paying extra for it?

LTE service is your phone internet service (ex. Verizon), but its LTE grade, giving much faster speeds than 3G. Whatever data plan you have determines what you're paying for.

LTE is the wireless internet that is provided with your cellular company, verizon or at&t, it will cost money depending on your plan