Cohort Analysis: What It Is and How to Use It
Cohort analysis groups users by behavior or date to measure retention, engagement, and conversion over time. Learn how to set it up and extract actionable...

Microsoft Clarity is a free user behavior analytics tool developed by Microsoft. Unlike Google Analytics, which focuses on quantitative metrics (visits, conversions, rates), Clarity shows you the how: what users actually do on your site, where they click, how far they scroll, and where they get frustrated.
The combination of heatmaps, session recordings, and behavioral metrics makes it an ideal complement to any analytics stack. Being completely free — with no traffic limits or sampling — it removes the cost barrier that tools like Hotjar or Contentsquare have.
Conversion rate optimization needs qualitative data just as much as quantitative data. Google Analytics tells you what is happening; Clarity shows you why. If a landing page has a 70% bounce rate, GA4 gives you the number, but Clarity shows you that users repeatedly click on a non-clickable element (rage click) or abandon just before the form.
Three exclusive Clarity metrics that directly impact CRO:
Go to clarity.microsoft.com, sign in with your Microsoft account, and create a new project by entering your website URL.
Clarity generates a JavaScript snippet you can install in three ways:
</head> closing tag.Once installed, set up filters to exclude internal traffic (your team's IPs) and bots. This ensures the data reflects real user behavior.
Clarity offers three types of heatmaps:
Shows where users click. Look for patterns like:
Reveals how far users scroll. The practical rule: if fewer than 50% of users reach your main CTA, you have a content hierarchy problem. Consider moving the CTA higher or creating an above-the-fold summary.
Groups clicks by page section. Useful for comparing the attention different content blocks receive and prioritizing what to optimize first.
Session recordings are Clarity's most powerful resource for generating CRO hypotheses. You don't need to watch hundreds of recordings; these strategies help you prioritize:
Use Clarity's filters to view only sessions with rage clicks or dead clicks. These are most likely to reveal usability issues.
Mobile and desktop behavior is radically different. Filter by device type and analyze each experience separately. Mobile conversion problems are often related to touch targets being too small or overly complex forms.
Filter sessions by pages visited to see only users who reached the checkout or contact form but didn't complete the conversion. These sessions show you exactly where and why they abandon.
| Aspect | Clarity | Hotjar |
|---|---|---|
| Price | Free, no limits | Free limited, plans from 39 USD/mo |
| Heatmaps | Clicks, scroll, areas | Clicks, scroll, movement |
| Recordings | Unlimited | Limited on free plan |
| Surveys | Not included | Yes (feedback and surveys) |
| GA4 Integration | Yes (Copilot + GA4 data) | Yes |
| Sampling | No sampling | Sampling on lower plans |
For most teams, the optimal strategy is to use Clarity as the base (unlimited heatmaps + recordings) and complement with on-site surveys using another tool if you need direct user feedback.
Clarity's most recent feature is Copilot, an AI assistant that automatically analyzes recordings and heatmaps to generate summaries and insights. Instead of manually reviewing hundreds of sessions, Copilot identifies behavior patterns, problematic pages, and improvement opportunities.
This is especially useful for small teams without a dedicated analyst: AI handles the triage and you focus on prioritizing and executing changes.
The recommended workflow for using Clarity within an optimization process:
Clarity isn't perfect. Knowing its limitations helps you use it better:
Even so, for a free tool, the value-to-cost ratio is unbeatable.
At Boost, we use tools like Microsoft Clarity within our conversion optimization process to understand real user behavior and turn data into business decisions. If you want to apply this approach to your website, discover our CRO services or analyze your site for free with Scan&Boost.
Adrià Vidal — Boost
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