Was told I was receiving a no trespassing order?

This is stupid but I genuinely don’t know what’s going on. I was in a parking lot eating ice cream with my boyfriend. I did have my head on his lap for a minute. Fast forward, a security officer comes by and i opened my door and ask what’s going on, he says that the registered owner of my vehicle will be receiving a no trespassing order. I tried asking questions, as what that consists of, and why we would be receiving that, and his response was “ask your parents”. I informed my mother of the situation, however If someone could please explain to me what any of this means. There were not any no trespassing signs, I did not receive a warning, he said we needed to leave and we did. I tried being nice about it however I couldn’t get any answers.