How do I know if my YouTube ads actually worked?

Views are the easiest number to inflate and the least useful. A cheap view from the wrong person, or a child on a shared phone, counts the same as a view from a buyer. Start with quality signals instead: the view rate on skippable ads, the share of viewers who reached 75% or 100% of the video, and the placement report showing where views came from. If most viewing happened on unrelated channels or apps, the views were not worth much.

Then direct actions. Set up conversion tracking in Google Ads for calls, WhatsApp clicks and form submissions on your website, so you can see what happened after someone clicked. Google also reports view-through conversions, where someone saw the ad and converted later without clicking. They are real but easy to over-credit, so treat them as a supporting signal, not proof.

Next, indirect effects. YouTube often works by making people search for you later. Compare branded searches in Google Search Console and Google Ads, and branded calls, in the weeks before, during and after a campaign. Build remarketing lists of people who watched, then see whether Search or Display ads to those lists convert better than ads to strangers. If they do, the YouTube spend is doing part of the work.

Finally, ask. Add 'Where did you hear about us?' to your WhatsApp greeting or intake form, and record the answers. For a clinic in F-10 or a car showroom on GT Road, a handful of customers saying 'YouTube par dekha tha' is evidence no dashboard provides, and it costs nothing to collect.