Which feature allows you to associate event data with users' Google accounts?

The feature that allows you to associate event data with users' Google accounts is Google signals. This functionality enables GA4 to collect data from users who are logged into their Google accounts across different devices. By activating Google signals, you can take advantage of cross-device tracking, allowing you to gain insights into user behavior that spans multiple sessions and devices. This is particularly valuable for understanding how users interact with your website or app over time, enhancing your ability to create targeted marketing strategies and improve user experiences.

In contrast, enhanced eCommerce focuses on specific metrics related to online shopping behavior, data import allows for integrating external data sources into GA4, and custom metrics are tailored measurements for specific user interactions but do not inherently link data back to Google accounts. Each of these features serves a different purpose within the GA4 ecosystem, but it is Google signals that specifically ties user data to their Google accounts, thus providing a deeper understanding of user journeys.