For standard content ads, we count a click when a user clicks on an ad.
Note: For the rewarded format, the clicks metric captures both physical clicks and engaged views. This means you should take care with any derived metrics (e.g., click-through rate (CTR), cost-per-click (CPC), etc.) for this format as they might be misleading.
Also, use caution when analyzing clicks and/or click-derived metrics for your entire account if you use the rewarded format. We recommend that you use the "Ad format" breakdown in your reports.