Conversion rate
The average number of conversions per ad click, shown as a percentage.
Conversion rates are calculated by simply taking the number of conversions and dividing that by the number of total ad clicks that can be tracked to a conversion during the same time period. For example, if you had 50 conversions from 1,000 clicks, your conversion rate would be 5%, since 50 ÷ 1,000 = 5%.
If you're tracking more than one conversion action, or you choose to count "All" conversions, your conversion rate might be over 100% because more than one conversion can be counted for each click.