How to write the advertising title of the shop is effective?

I feel dizzy after reading your question. What kind of shop: entity or network?

since the advertising slogan is mentioned, I suggest you

1. The key of advertising slogan is to grasp the consumer psychology: value price? Product features? Super popular?

2. The advertising language should be short: for example, the "5.1 promotion" will be far better than the "buy one get one free plus 5 points as a gift for the terminal promotion of the largest store in Chaoyang District, Beijing" (but it is not much better)

3. The most important thing is to look at your product environment: for example, if everyone is shouting for price reduction promotion, you will not shout for price reduction promotion at this time, even if you shout loudly. If everyone else shouts crazy sale, you shout new product sale.

PS: just saying, don't take my words seriously.