A website uses an Amazon Bedrock generative AI assistant to help customers choose and buy products. The company wants to quantify the assistant's direct effect on sales. Which metric best measures this impact?

The conversion rate of customers who purchase products after AI assistant interactions directly measures the assistant's impact on sales. This metric quantifies how effectively the AI assistant guides users from interaction to a completed purchase, directly linking its performance to revenue generation. The number of customer interactions with the AI assistant is a measure of engagement, not sales impact. While high interaction numbers can be positive, they don't inherently translate to increased sales. Sentiment analysis scores from customer feedback indicate user satisfaction, which is important for overall experience but doesn't directly quantify sales. Natural language understanding accuracy rates measure the AI's technical performance in understanding user queries, which is a foundational capability but not a direct sales metric.