What is Google's HEART framework, and how do you turn user-experience goals into precise metrics?

Short answer

It measures user experience across five dimensions: Happiness, Engagement, Adoption, Retention, and Task Success, using a Goals-Signals-Metrics (GSM) matrix.

Explanation

HEART's main tool is the GSM Matrix. First set a high-level experience Goal (for example, helping users find what they want easily), then identify a behavioral Signal that indicates success (such as clicking the first result without changing the search), and then define an observable numeric Metric (such as the percentage of successful first-try clicks). This prevents teams from drowning in misleading surface metrics.

Common mistakes

• Collecting random general metrics without first defining the human and business goal behind measuring them.
• Focusing only on Engagement, even if it results from user confusion and spending longer searching for a button.

Follow-up questions

• What is the System Usability Scale (SUS), and how do you calculate and interpret its score?

Sources

• Google Research — Measuring the User Experience on a Large Scale: User-Centered Metrics for Web Applications