According to survey results released in December by Ipsos Open Thinking Exchange (OTX), 78% of US Internet users between the ages of 18-64 agree that online reviews help them decide whether or not to purchase a product.
Based on the study's findings, it appears that Americans are 13% more likely to agree that online product reviews influence their purchases than the global average.
Source: Marketing Charts: https://www.marketingcharts.com/wp/topics/asia-pacific/8-in-10-americans-agree-that-online-reviews-influence-their-purchases-25761/