Before you can optimize your website for mobile users, you need to understand who they are and what they want. To do this, you can use Google Analytics to track and measure mobile traffic, conversions, bounce rate, device type, location, and other metrics. You can also survey your mobile users directly to get their preferences, needs, goals, and feedback. User testing tools like UserTesting or Hotjar can help you observe and record how mobile users interact with your website. You can also create user personas based on the data you collected to guide your CRO strategy and decisions. Once you have a clear picture of your mobile users, you can segment them according to their demographics, psychographics, behavior, and interests. For example, you can segment mobile users by age, gender, income, education, attitudes, values, motivations, frequency of visits, duration of engagement, loyalty to the website or app, topics of interest, categories of products they purchase or view often etc.