I came across Cho Yoon-woo because of all the hype around 'Youngest Scion of the Mages'—it's everywhere on the webtoon and web novel communities. So, he's a South Korean author, primarily known for that series, which is a regression fantasy where the protagonist gets a second chance. Honestly, I had to dig a bit because his name is often romanized differently; you'll see 'Jo Yun-u' or just 'Yoon Woo' floating around. He seems like one of those authors who hit a big niche trend perfectly, but there's not a ton of personal bio out there, which is pretty typical for a lot of web novel writers.
From what I've gathered, his main published work is the 'Youngest Scion of the Mages' web novel, often stylized as 'The Youngest Son of the Magic Clan' or similar variations depending on the translation site. It's serialized on platforms like KakaoPage. The premise is classic for the genre: a powerful mage regresses into the body of a young, overlooked scion in a magocratic family and uses his future knowledge to change his fate. The appeal is really in the strategic climbing and the magic system details.
I haven't seen a formal bibliography of novels in print, as his career seems rooted in the digital serial space. Sometimes these authors have their serials later published as e-books or physical volumes, but that's about it. It's interesting how these names can become so prominent for one major series without the traditional author 'profile' we might expect. Makes me think the focus is entirely on the story world, not the creator's persona, which is kinda refreshing in a way.