They didn't inform me that it was a performance review. I did not notice that it was a performance review. It wasn't made clear what or weather i was doing well

They didn't inform me that it was a performance review. I did not notice that it was a performance review. It wasn't made clear what or weather i was doing well or should change behavior. I didn't interpret the meeting as intended to have any effect on my employment. It was months later, after I had started hearing friends talk about their performance reviews, that I realized that I had one as well.