Final answer:
Use the Landing Pages report to identify pages with high bounce rates. This report shows the first pages visitors see and includes bounce rate metrics, helpful for understanding user engagement.
Step-by-step explanation:
To identify the pages of your site that have the highest bounce rate as the first page of a user's session, you would use the Landing Pages report in the Behavior section of your analytics tool.
The Landing Pages report provides data on the first page users land on when they visit your site. This includes metrics like bounce rate, which is the percentage of single-page sessions in which there was no interaction with the page. A high bounce rate generally indicates that site entrance pages aren't resonating well with your audience.