To fix issues with Google Core Web Vitals, website owners should start by measuring their current performance using tools such as Google’s PageSpeed Insights and the Chrome User Experience Report. These tools identify areas for improvement, such as optimizing images, minimizing JavaScript, and enhancing server response times. Addressing these issues often involves technical adjustments on the website, including code optimizations, reducing resource loads, and adjusting web design elements to improve loading times, interactivity, and visual stability.