Choipoiyoi94
That’s a sniffing card. 😊
The term is actually commonly used in “Schnupperlehre”, which is an approx. 1 week long test / trial apprenticeship for teenagers towards the end of the compulsory school period. During that week, they can “sniff” = figure out hands-on in a real work environment whether a particular job is the right thing for them before signing for good and thus committing for the next 3-4 years.
Related to those public transport passes or cards, it basically means “promo deal”. However such “sniffing” offers are usually not available on their own, only bundled as a bonus together with some other regular offer.