A React component is created to display star ratings charts, which can be used to visualize the average rating of reviews by age group. The chart uses data from an object passed as a prop, where each key represents a review age group and its corresponding value is an array containing the number of reviews in that group for each possible rating (1-5 stars). The component processes this data to adjust it according to the chart's requirements and displays it using the react-chartjs-2 library. The chart includes features such as tooltips, customizable colors, and a header displaying the average star ratings for each age group.