You might want to elaborate on that question a bit. Do you mean for an individual, for a company, a government, a society in general?
And what do you mean by using the internet? Obviously unless you live as a hermit in the woods many systems you use every day are going to use the internet anyway, the traffic light as you are crossing the street, the order system the stores you shop at use to fill their shelves, your employer, the government departments managing the infrastructure in your area and your taxes and other bureaucratic data about you and your possessions, your doctor, the producers of most of the goods you use, the phone system,…
So presumably you mean some sort of direct use on a device you interact with, what do you mean there, the web? Social media? Messengers? Email? Voice calls? Video calls? Video conferences? Online games? Search engines? Mapping apps? Wikipedia? Youtube? Netflix, Amazon Prime and similar sites? Twitch?