One popular example of a fast free website theme is WordPress’s “Twenty Nineteen” Theme which comes with basic customization options such as setting up navigation menus and selecting featured images or videos in posts or pages. Other great examples include Astra, OceanWP and GeneratePress which have more advanced features than the default WordPress core offering including page builders and SEO optimization toolsets integrated into their packages. Each theme will offer unique customization options but all provide good performance on mobile devices while loading quickly – an essential aspect when creating an engaging user experience on any modern website.