First impression is important
You start your English classes after a long break. You meet new people in your work, school, etc. You simply go out and unexpectedly make new friends. What do you say about yourself in such situations? Are we even supposed to say more than just our name? Yes, we are.
The researchers say that it takes us circa 7 seconds to decide if we like someone. The same applies to others that have the same time to know whether they like us. In this short time we barely can say anything but after we can prove if our speaker's first impression of us was right or wrong.
Think now of all the situations when you were asked to introduce yourself. How was it? In most situations it's quite stressful and people do not exactly know what to say. Meeting new people in our life is inevitable, so why don't we prepare for that properly?