How do I track where my leads come from?

Track lead sources using: Google Analytics UTM parameters on all marketing links, call tracking numbers (different numbers for different channels), form submissions with hidden source fields, CRM integration that logs the referral source, and Google Search Console for organic search data. For phone calls, services like CallRail assign unique tracking numbers to your website, Google ads, and print materials. For forms, add hidden fields that capture the visitor's landing page and referral source. This data shows you which marketing channels generate the most leads and the best ROI, so you can invest more in what works and cut what doesn't.