The final step to creating a mobile-first marketing strategy is to measure and improve your results. You need to track and analyze your mobile marketing metrics, such as traffic, engagement, conversion, retention, and revenue. To do this, you can use tools like Google Analytics, Facebook Insights, or email marketing software. Additionally, you should use tools like Google Optimize, Hotjar, or SurveyMonkey to conduct A/B testing, heatmaps, and surveys. To measure and improve your mobile-first marketing strategy, it's best to use SMART (specific, measurable, achievable, relevant, and time-bound) goals and KPIs (key performance indicators). Dashboards, reports, and alerts can be used to monitor and compare your mobile marketing performance. Additionally, feedback, reviews, and ratings should be used to understand and improve your mobile user experience and satisfaction. Experiments, hypotheses, and variations should be used to test and improve your mobile marketing elements. Finally, best practices, benchmarks, and competitors should be used to learn and improve your mobile marketing tactics and strategies.