A developer is tasked with enhancing the performance of an online learning platform that uses a serverless architecture. The platform relies on Amazon API Gateway to handle user requests, AWS Lambda to process quiz submissions, Amazon DynamoDB to store course progress data, and Amazon S3 to host video lectures. During peak hours, the platform experiences high latency caused by increased read operations on DynamoDB, leading to a poor user experience. Which AWS service or feature should the developer implement to optimize DynamoDB read performance and reduce latency?