In my first job, we would get performance reviews written by our supervisor after most large projects. I then moved to a competitor and you had to self-evaluate and go over it with your supervisor.
On my first engagement at the new company I was modest about my performance, even though I thought I had done very well. I did not want to “toot my own horn” too much. The supervisor basically nodded and agreed with everything.
I quickly learned to take credit for everything I did. In fact, I was the sole person responsible for the sun rising every morning. I learned that most people want to avoid conflict so as long as I had tangible things to speak of, I was seldom challenged. I am sure this one change I made resulted in a significant impact on my annual earnings and bonus.