You will be charged per click. You pay only when customers click on your property’s sponsored listing. 

Note: The click delivery depends on different factors like hotel CTR (click-through rate), overall traffic, etc., which are outside our control. As a result, sometimes it's possible that fewer clicks than purchases are delivered. In such cases, the campaigns are extended for some duration. But beyond that, if we are unable to serve the clicks and the campaign is ended, the remaining amount gets refunded. Refunds take 2–14 days to process.