how to decribe a promotion sale /

Andy Huo
You may be asking me one of two different questions here. If you're asking about the term itself, I think in English we usually call it a "promotional sale" rather than a "promotion sale." If you want to know how to describe the sale itself, that really depends on what product or service the sale is on, what exactly the promotion is and to whom the product or service and the promotion are being targeted, so without any information about these matters I'm unable to give you specific advice, sorry.

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