I understand the general concern, but a bit confused about the details. Could someone do me a favor and write down a simple example of how this can violate priv

I understand the general concern, but a bit confused about the details. Could someone do me a favor and write down a simple example of how this can violate privacy? Something like "User logs into Chrome, this automatically logs the user into ???. The user then visits ???. As a result Google learns ??? about the user. This was impossible before this Chrome change, and this sharing of information isn't clearly agreed to by the user." If there are several materially different scenarios that can result in privacy violation, would be great to know.