It means "It's an introduction."
The text "ㄹㅇ" is a Korean slang abbreviation that stands for "리얼" (real). In English, it can be translated as "for real" or "really."
🔥
It's fun.
ㅋㅋㅋ
🔥🥵
오 사랑해요
🔥
The text "ㅇㅈ" is an abbreviation in Korean that stands for "인정," which translates to "acknowledgment" or "recognition" in English.