Hiring a professional web designer can significantly improve your website's SEO, as experienced designers are well-versed in the latest SEO trends and best practices. A skilled web designer will optimize your site's architecture, design, and code to enhance its accessibility, performance, and overall user experience. Additionally, a professional web designer can recommend and implement other advanced SEO techniques, such as content optimization, link building, and local SEO strategies, to further boost your site's online visibility.