Out of all the media I read, watched or listened to, Kimetsu no Yaiba is the single greatest one.

STORY
The story is simple but that's what makes it good. There isn't any confusing lore or exposition at the beginning. There are demons bad and they cause problems and Demon slayers solve the problems. It's the story behind each of Demons and Demons Slayers that hook you in. The backstory for many characters are short but they feel so real that you sympathize with almost every character. (Akaza and The fourth moon being my favorites)

CHARACTERS
Tanjirou is very likable and easy to relate to. His goal is to save his family and restore his sisters humanity which make his goal realistic. He must save or or she will turn into a demon. He isn't just killing demons because he want to be 'The Greatest Demon Slayer'. The side characters also get similar treatment and many having very emotional (I might be a crybaby though) backstories.

ART AND ENJOYMENT
The art is really good. Yeah, moving on. The action is very engaging, taking up whole panels during techniques and fights just being hella cool. The jokes and serious combat moments are never combined so intense moments are never ruined. Personally, Zenitsu can be a little annoying but the crybaby stuffs dies off after chapter 80-ish.

Overall, the combination of all of these tings makes it the greatest thing ever. I can't find the right words so just read it.