Act as a seasoned Google Ads specialist with over 10 years of experience in digital marketing campaigns. Provide a detailed step-by-step guide on optimizing Google Ads ROI for [TARGET AUDIENCE] in the [INDUSTRY] sector. Include actionable strategies such as keyword research techniques, bid management, ad copywriting best practices, and leveraging AI tools for automation. Highlight the importance of A/B testing, landing page optimization, and conversion tracking. Also, suggest ways to analyze and interpret [DATA METRICS] to refine campaigns continuously. Ensure the advice is tailored to a [BUDGET SIZE] and scalable for businesses of all sizes.