Bounce Rate is a web analytics metric that measures the percentage of visitors who leave a website after viewing only one page. A high bounce rate may indicate that the content is not engaging or relevant to the audience, leading them to exit without exploring further. This metric is important for website owners and marketers, as it helps assess the effectiveness of their content and user experience. By analyzing the bounce rate, they can identify areas for improvement, such as enhancing page design or providing more valuable information to keep visitors engaged.