What is the impact of incorrectly specifying the 'availability' attribute in a Google Merchant Center product feed on ad performance?

Incorrectly specifying the 'availability' attribute in a Google Merchant Center product feed has a significant negative impact on ad performance and can even lead to disapprovals. The 'availability' attribute indicates whether a product is in stock and ready to ship. If this attribute is inaccurate (e.g., listing a product as 'in stock' when it's actually 'out of stock'), ....