Hi, Lily
This is a really good question. Most Business people have the same question. The 10 promotion types are all things simply called free. yes, because how many years you can give it that. suppose u want to give a coupon or discount on whatever people purchased it will be wrong. sometimes it works but you want to create value. it means brand awareness. Not only this all things attract people provide your business uniqueness to u are customers. This all thing create sales couple of days or week or year. when your audience like your product or service value definitely might back and they don’t need these promotions. create longterm promotion. brand awareness, brand building. you can’t decide which promotion works from people’s vote. sales based on your product and service and your audience