Hi @Seller_IvtzT0FkraszX,

There could be several reasons for decreasing ad impressions. Here are two things I'd check first:

1. Compare your bids with Amazon's suggested bids. Ad impressions often decrease when competitors increase their bids, pushing your ads down or out of rotation.
2. Review the bid controls in your campaign settings. There's a setting that internally "Lowers your bids in real time when your ad may be less likely to convert to a sale." By changing this to "Fixed bid" you can ensure Amazon "Uses your exact bid and any manual adjustments you set, and is not subject to adjusted bidding." The exact wording might differ slightly in the campaign manager, as these quotes come from the developer documentation (https://advertising.amazon.com/API/docs/en-us/reference/1/bid-controls).

Hope this helps!