Job fairs usually bring a resume, at most a cover, because you have to vote for many companies. It costs money to make it beautiful and better, and it does not rule out being regarded as waste paper by recruitment companies (after all, there are more wolves and less meat now), wasting money and resources. Copies of transcripts and certificates must be printed, so you must bring them with you during the interview. Finally, people will need your information when signing an agreement with you.