Conquering Dungeons With Copy Paste! is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Sano Haruto was a low-ranking adventurer who lived his meager life as a hunter. He was always treated as an errand boy because of his cursed skill, [Copy Paste]. In this world of hunters, leveling up was vital, but the drawback of his skill made leveling up next to impossible. Soon enough, he was kicked out of the Hunter Guild he belonged to. Now unemployed, Haruto accidentally discovered how to use his skill to fighting monsters as a day laborer. The Copy Paste that he once thought was useless was actually the best skill! And perhaps even the strongest! With his power, he aims to save the world from a major disaster and become the strongest hunter alive!