What does it mean to move the social security card to the unit for safekeeping?

Hello, this friend, do you mean that after you join the work, you should hand in your social security card to your company? If so, the unit should handle five insurances and one gold for you. The company definitely needs you to provide personal information, including social security card, household registration book, ID card, etc. Under normal circumstances, after the company enters personal information into the system, the social security card will be returned to you, so don't worry. If it is for other reasons, it depends on the actual situation. The social security card is equivalent to our ID card and bank card and cannot be easily given to others.