"YH" is a two-letter abbreviation used in digital communications that stands for "yeah" or "yes". It is a slang method of responding positively or in agreement to a question or statement. "YH" is commonly used in online social media platforms such as WhatsApp, Snapchat, Discord, TikTok, Instagram, and personal texting messages. It is used in the same way in online and text conversations as it is in face-to-face conversations. "YH" is very informal, so it should only be used in informal situations.