If the offer allows deeplinking, you can generate a deeplink to a specific product page. You can check the deeplinking availability on the offer page:
If it’s set to “Yes”, you can create deeplinks for this offer.
Go to the advertiser’s webpage and choose any product you want to promote:
Copy the URL link of this product’s webpage, paste it to the deeplink bar and press Update:
Note: keep in mind that not all deeplinks will work with Google Ads.