Google Analytics is an invaluable tool for email marketers, as it provides insights into how users interact with emails and subsequent web pages. By analyzing metrics such as open rates, click-through rates, and conversion rates, marketers can assess the effectiveness of their email campaigns. This data-driven approach allows for the optimization of future emails, ensuring they are more targeted and effective. Moreover, Google Analytics can track the behavior of users who arrive on your site through email links, offering a comprehensive view of the customer journey.