> ## Documentation Index > Fetch the complete documentation index at: https://docs.scanova.io/llms.txt > Use this file to discover all available pages before exploring further. # Browser SDK Overview > Track user behaviour on your website after a QR Code scan using the Scanova Browser SDK — page views, clicks, scroll depth, form submissions, and custom events. The Scanova Browser SDK is a lightweight JavaScript snippet (\~10 KB) that you add to your website once. After installation, it automatically tracks page views, link clicks, scroll depth, and form submissions — all attributed to the QR Code scan that brought the user to your site. ## What the SDK does When a user arrives at your site via a QR Code scan, the URL contains a `scnv` parameter: ``` https://yoursite.com/?scnv=7ad26d4f-3181-4ef8-b6ca-b8f59499dd43 ``` The SDK: 1. **Reads the `scnv` parameter** and saves it to `localStorage` (60-day expiry) 2. **Tracks built-in events** automatically (page views, clicks, scroll, forms) based on your configuration 3. **Attaches attribution** — every event carries the `scan_session_id`, linking it to the originating QR Code 4. **Persists across pages** — if a user navigates to another page on your site, the attribution follows them ## Auto-tracked events Enable these with a single toggle in the init options: | Option | What it tracks | Event type sent | | -------------- | -------------------------------------------------------- | --------------- | | `autoPageview` | Every page load | `pageview` | | `autoClicks` | Clicks on links, buttons, and `[role="button"]` elements | `click` | | `autoForms` | Form submissions | `form_submit` | | `autoScroll` | Scroll depth at 25%, 50%, 75%, and 90% | `scroll` | Full details: [Auto-Tracked Events](/conversion-tracking/browser/auto-tracking) ## Custom events Beyond auto-tracking, you can send any event from your JavaScript code: ```javascript theme={null} scanova('track', 'cta_click', { button: 'Start Free Trial' }); ``` Full details: [Custom Events](/conversion-tracking/browser/custom-events) ## Requirements * A website where you can edit the HTML `` section or add a tag via Google Tag Manager * A tracking site created in **Integrations → Conversion Tracking** with your domain added to **Allowed Domains** * The `site_id` from the dashboard ## Before you install Make sure: * [ ] Your tracking site is created in the dashboard * [ ] Your website's domain is listed under **Allowed Domains** for that site * [ ] You know where to add a `