512 City Design & Marketing is a web solutions company that serves businesses and professionals in Round Rock. It offers digital marketing services, such as on-page optimization, SEO strategy and deployment, content development, and social media implementation. The company assists in creating a brand's online presence and voice. It also provides website development, hosting, and security services. It strives to help clients improve Google search results and reach their target audience. It was established by Leslie A. Cooper in 2012.