Track visitors across subdomains

DataFast automatically tracks visitors across any subdomains of your main domain for maximum analytics accuracy.

Setting up subdomain tracking

1. Create a website in DataFast using your root domain (e.g., example.com)
2. Install the tracking script on all your subdomains (e.g., app.example.com, blog.example.com)
3. Use the same website ID and domain parameter across all installations

<script
  defer
  data-website-id="yourwebsiteid" 
  data-domain="example.com"
  src="https://datafa.st/js/script.js"
></script>

Benefits of cross-subdomain tracking

• Unified visitor journey: Track users as they navigate between your marketing site, app, blog, and other subdomains
• Accurate attribution: Properly attribute conversions to marketing campaigns even if users move between subdomains
• Complete analytics: Get holistic data about user behavior across your entire domain ecosystem
• Simplified reporting: View combined traffic and conversion data in a single dashboard

Common use cases

• Track user journeys from your marketing site (example.com) to your app (app.example.com)
• Attribute conversions to the correct marketing channel when users navigate across subdomains
• Analyze how content on your blog (blog.example.com) drives traffic to your main site

DataFast handles all the cross-domain cookie synchronization automatically, so you don't need to write any additional code to track users across subdomains.