Firt impreion i the event where one peron firt encounter another peron and form a mental image about him or her.
Firt impreion i omething hard to change if you give ome one a bad firt impreion believe me they will tick on the mental image of your for quite a long time until they have the opportunity to know you better. Thi i relatively important when you are going for ome interview either for your cholarhip chool intake or job. If you give thoe interviewer a bad firt impreion they will give you a very low mark even you are graduated from Harvard or Cambridge with firt cla honour.
In a nuthell alway give people a good impreion on you! Take care of your behaviour peronal hygienic and dre properly according to the ituation and you will be jut fine.