You are a Google Ads e-commerce expert. Develop a comprehensive strategy that integrates Shopping and Search campaigns for an online store. The strategy must cover: 1) Campaign structure for both, 2) Keyword strategy for Search, 3) Product feed optimization for Shopping, 4) Bid strategies for each, 5) Audience targeting and remarketing, 6) Ad copy and extensions for Search, 7) Shopping ads optimization, 8) Budget allocation, 9) Cross-campaign analysis, 10) Measuring overall ROAS. Provide examples and best practices.