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Data-driven design: how to use metrics to improve user experience.

Web design is no longer just about inspiration or intuition. Today, if you want your site to truly perform, you need to look at the data.Guessing what your users like might be a good starting point, but measuring it takes you to another level.

Designing based on data means making decisions using real information: how people navigate, what they click on, where they drop off, how long it takes them to find what they’re looking for. And with that info, you adjust whatever’s necessary to make the experience smoother, faster, and more effective.

Which metrics should you track?

You don’t need to be a data scientist. There are basic metrics anyone can start tracking:

  • Bounce rate: Are people leaving the site without doing anything? Something isn’t working.
  • Pages per session: If they only visit one page, maybe you're not offering a clear user journey.
  • Time on site: If users leave quickly, they probably aren’t finding what they need or are getting frustrated.
  • Heatmaps: These show where users click most, how far they scroll, and what they ignore.
  • Conversions and funnels: These tell you where people are dropping off (like in a form or just before making a payment).

How to apply this data to design?

The key is identifying patterns and acting accordingly. It’s not about changing things just for the sake of it, but understanding which parts of your design are causing friction and optimizing them.

For example:

  • If many users abandon their cart, maybe the purchase button isn’t clear enough or the form is too long.
  • If no one scrolls, maybe your most important content is too far down the page.
  • If everyone is clicking on a non-clickable element—watch out! They might be expecting an action that doesn't exist.

Based on this, you can test changes and measure again. It’s an iterative process: adjust, test, and adjust again. UX is not static.

Want to take your website to the next level?

At Lab9 we specialize in UX/UI and development. We analyze your users’ behavior, identify opportunities for improvement, and redesign your site with a results-driven logic.

Get in touch with us!