I'm wondering what a one-time use means? Does it mean that it's one coupon that can be used only one time, and then it will expire and no one else can use it and I have to create another one for another user?
Or it means that it's a coupon that can be used once per user, that's mean that it will expire for the user, but I can use it with another user, like a "welcome" coulon.
Thanks for your help.
Limit to one use per customer, basically means that every customer that chooses to use the coupon can use the coupon only once.
There are two available settings for both of the situations you described. You can find them listed in Step 10 of this help document, but I'll explain them here for you as well. These settings are found under the Usage limits section when creating a discount:
What type of discount promotions are you looking at running? We have a blog article on ways to use discounts to generate more sales if you're interested in some coaching information. Let us know if you have further questions!