Buy one get one free is an offer giving a second item at no charge. Advertised as buy one get one free.
It shifts stock that is close to date and makes people buy more than they need. Buy one get one free was restricted on unhealthy food in Britain for exactly that reason.
1phrasebuy one get one freeAn offer giving a second item at no charge.
“It was buy one get one free and they came home with six.”
buy one get one free is an offer.
Practised in Shopping & Money