小巴是其公司网站 LogoMaker.com 的营销者。这家公司通过网站出售图形徽标设计服务。他的几个同事表示这个网站不好用。小巴觉得，如果网站能让用户在浏览时感到满意，就会有更出色的业绩。 为了改善网站的用户体验，小巴应该侧重于哪两个方面？请选择最佳答案。

To improve user experience and website performance, focusing on navigation and landing pages is crucial. Good navigation allows users to easily find what they need, reducing frustration and increasing engagement. Poor navigation, as suggested by "不好用" (not user-friendly), directly hinders user satisfaction. Landing pages are critical because they are often the first interaction point for users, and a well-designed, relevant landing page can significantly impact conversion rates and overall user satisfaction. While images are important for aesthetics, they are a component of landing page design rather than a standalone aspect of user experience improvement. Specialization certification and optimization are broader concepts; optimization encompasses many elements, including navigation and landing pages, but these two are more specific and impactful for direct user experience improvement.