What does the conversion rate represent in Google Ads?

• A. The percentage of ad impressions that convert
• B. The average number of conversions per ad interaction
• C. The total conversions divided by total clicks
• D. The average cost per conversion

Answer: (B)

Understanding how often a click leads to a desirable action is the key idea here. In Google Ads, conversion rate shows what portion of ad interactions (clicks) result in a conversion, typically expressed as a percentage.

The best description is that conversion rate is the average number of conversions per ad interaction. In other words, it tells you, on average, how many conversions happen for each click. If you calculate it exactly, it’s conversions divided by clicks, multiplied by 100 to turn it into a percentage. This framing highlights that it’s a rate measured per interaction rather than by impressions or by cost.

Why the other descriptions don’t fit as well: using impressions shifts the focus away from the actual click-to-conversion path, which is where conversion rate lives. Stating conversions divided by total clicks is the raw ratio, which is close, but the standard way to think about conversion rate is in terms of conversions per interaction expressed as a percentage. And cost per conversion is a separate metric entirely, focusing on spend per conversion rather than the frequency of conversions per click.