Heatmap

What is a heatmap?

A heatmap is a visual tool that shows where visitors click, move their cursor, and focus their attention on a web page. It uses colors to display activity. Red and orange mark high-activity areas. Blue and green mark low-activity areas. Transparent zones had no recorded interaction.^[1]

Heatmaps collect data from many visitors and combine it into a single image. This lets teams see how a page performs in practice without watching individual recordings.

What types of heatmaps exist?

Click maps show where people click or tap. They reveal whether visitors actually use your buttons and links. They also show if people try to click on things that are not clickable. That is a clear sign of confusion.

Move maps track cursor movement on desktop. People tend to move their cursor toward what they are reading. This makes move maps a rough guide to where attention goes. But the link between cursor position and eye gaze is not perfect, especially on complex layouts.^[2]

Scroll maps show how far down the page visitors scroll. They help teams see whether content below the fold actually gets seen. Scroll maps are often treated as their own category.

Attention maps combine click data, movement data, and time on page. They estimate where visitors focus mental effort, not just where they move their cursor.

How do heatmaps work?

Heatmap tools use a JavaScript snippet added to your site. As visitors browse, the script records where they click and move. It sends this data to the analytics platform. After enough visits are collected, the tool creates a visual overlay on a screenshot of your page.^[3]

The tool must handle different screen sizes. A heatmap from desktop sessions does not reflect mobile behavior. Good tools segment data by device type so the results stay accurate.

For large organizations running sites on multiple subdomains, IT teams need to verify that the snippet loads correctly across all properties.

What are the privacy concerns with heatmaps?

Heatmap tools can accidentally capture sensitive data. If a visitor types personal information into a form, the tool might record it. Reputable tools automatically hide input fields and let site owners exclude specific elements.

Under GDPR, deploying heatmap tracking without a lawful basis is a compliance risk. Choosing GDPR-compliant analytics tools that work without cookies reduces this exposure. Organizations must disclose heatmap tools in their privacy policy. Legal teams should review the vendor's data processing agreement before installation.^[1]

For public-sector websites and banking portals, this review is especially important. These sites handle sensitive user data, and any undisclosed tracking creates regulatory exposure.

How do teams use heatmaps?

Content teams check whether important messages sit in high-attention zones. If a key call-to-action button gets almost no clicks, it may need to move higher on the page.

UX and IT teams use heatmaps to find "rage clicks." These are rapid, frustrated clicks on elements that do not respond. Rage clicks often point to broken links or confusing design elements.

Marketing teams compare heatmaps before and after a page redesign. This shows whether the new layout actually performs better.

Compliance teams use scroll and click data to confirm that required disclosures and consent notices are visible and reachable for visitors.

For organizations with 50,000+ page views per month, heatmaps turn guesswork into evidence. They show what visitors actually do, not what teams assume they do.

How Askem Helps

Some analytics platforms include built-in heatmaps alongside traffic data, so teams do not need a separate tool to install and maintain. Cookieless heatmap tools — like those offered by Askem — work without a consent banner and capture behavior from all visitors. For regulated organizations like banks, healthcare providers, or public agencies, choosing a cookieless solution removes the GDPR risk that comes with many third-party heatmap tools.

Sources

1. Nielsen Norman Group — Heatmaps for UX and Web Design: https://www.nngroup.com/articles/heatmap-visualizations-tasks/
2. Rodden, K., & Fu, X. (2007). Exploring How Mouse Movement Relates to Eye Movement on Web Search Results Pages. Google: https://dl.acm.org/doi/10.1145/1242572.1242604
3. Google Web Dev — Measuring user engagement: https://web.dev/articles/user-centric-performance-metrics