What do you mean by this? All major corporations use private internal data to drive their products, including competing with their own customers. Amazon's ecommerce business is notorious for this and a reason why other major retailers tell their vendors not to use AWS. This was all just discussed days ago: https://news.ycombinator.com/item?id=22079174
That being said, and with 15 years of adtech of experience, I guarantee that there's absolutely no usage of business customers' first party data by Google's adtech system. While companies can use it to match and target their users, they have to do explicitly with lots of restrictions and protocols and it's only become more limited with new privacy regulations.
That being said, and with 15 years of adtech of experience, I guarantee that there's absolutely no usage of business customers' first party data by Google's adtech system. While companies can use it to match and target their users, they have to do explicitly with lots of restrictions and protocols and it's only become more limited with new privacy regulations.