What's one of the reasons that advertisers should adopt enhanced conversions for web?

The selection is correct because enhanced conversions for web increases conversion observability by recovering measurement signals that would otherwise be lost to modern privacy restrictions, browser limitations, or the deprecation of third-party cookies. By utilizing hashed, first-party data—such as a customer's email address—provided at the time of a transaction, Google can securely match that conversion to a signed-in Google account that previously interacted with an ad. This process fills in data gaps in a privacy-safe manner, providing a more complete and accurate picture of campaign performance to better inform machine learning and automated bidding strategies.