Amazon's self-advertising needs to run for 15 days. Generally, it is recommended that new products run for at least 15 days, but you have to remember that 15 to 30 days is a normal situation. You must pay attention to your ads. It does not mean that we will not check them for 15 days. We must be clear about this. We must check them at least twice a day for 15 days. If time permits, I will not talk about part-time sellers. It is normal for us full-time sellers to check them 2 to 3 times a day, because there will be a lot of junk words that are not related to your product. Such words must exist. Such words must be denied as soon as possible, otherwise they will eat up your advertising fees. Junk words have no conversion.