Excuse me, do hotels in Korea generally provide toothpaste, toothbrush, slippers and towels? Or do you need to bring your own? What should I do if I want to get on WIFI?

It depends on which class you live in. In general hotels, I suggest that I bring my own toothbrush, toothpaste, shampoo and shower gel, which may not be provided by the hotel. If you are neat, you can also bring your own towels and slippers. But even if not, the local convenience store bought it, which is quite convenient. Free Wifi is available in many places, including hotels. Some hotels can surf the internet in the lobby, and the signal in the room may not be strong.