For many businesses the most valuable conversion happens on the phone. Without call tracking, those sales look like they came from nowhere, and the campaigns that drive them look unprofitable.
Create a pool of tracking numbers and tracko.js swaps your site's numbers in page text and tel: links, keeping your formatting and re-swapping content that loads later. Each number is reserved per visitor session. When someone calls, the call is matched to the session that showed the number, so phone sales get the same attribution as online ones. The caller's number also identifies the person, so a call from an existing lead joins their journey even without dynamic numbers.