As part of a Reddit AMA that Google’s Gary Illyes completed in February 2019, a user asked a question with regards to the impact of conversion rates on search results.
Specifically Gary was asked:
“I guess Google is smart enough to understand conversions on some website (bought product, booked accommodation, etc).
Is the percentage (or a number) of conversions something that Google would count as a ranking factor (as a good UX signal)”
Gary replied with a brief but definitive response:
So there we have it, having neither a positive, or negative converstion rate from customers on your site will impact how your site ranks in Google search results.