Setup Google Ads Conversion Tracking

I want clear, reliable insight into which Google Ads clicks turn into paid bookings on my site. The end goal is to capture every sale that happens through the built-in booking engine and pass that data back to Google Ads for accurate conversion reporting and optimisation... (Budget: $30 - $250 USD, Jobs: Analytics, Digital Marketing, Google Ads, Google Adwords, Google Analytics, MySQL, PHP, Website Optimization)