What is a Promo code and security code?

Question

A game i'm signing up for is asking me for a Promo code and security code i don't know what they are i'm dumb sorry.

Answer 1

a promo code is a rule for converting a piece of information (for example, a letter, word, or phrase) into another form or representation, not necessarily of the same type.

a security code is The security code is a three or four digit code printed (not imprinted or stamped) on your card. On Mastercard ,Visa, and Discover, the code is usually on the back of the card, to the right of the last four digits of the card number.