Which identifier is described as the most common method to match intent to an account?

• A. IP address
• B. Mobile advertising ID
• C. Cookies
• D. Email address

Answer: (A)

Matching intent to an account hinges on identity signals that tie a user’s actions across sessions to a single overarching reference. The IP address stands out as the most common signal because it’s automatically captured in nearly every online request and can link multiple touchpoints to the same household or network. This makes it a practical baseline for associating various interactions—like searches, page visits, and ad engagements—with one account, even before a user logs in or provides explicit identifiers.

Of course, IPs aren’t perfect. They can change, be shared across devices in a home, or be masked by VPNs, which means they’re a broad, approximate identifier rather than a precise one. Other methods, such as cookies, device IDs, or an email address, can offer stronger, more exact ties but require the user to be on a specific device, have consent, or have authenticated themselves. In many setups, the IP address provides the most widely available starting point to connect intent signals to an account, with more precise identifiers layered on when available.