In this episode of The Future of Consumer Marketing, host Brett Stapper interviews Llibert Argerich, Chief Marketing Officer at Thumbtack. Thumbtack is a two-sided marketplace connecting homeowners with home service professionals, competing primarily against word-of-mouth referrals in an extremely fragmented market. Over the past two years, Llibert has transformed Thumbtack's marketing from a concentrated SEM strategy into a sophisticated 11-channel growth engine that balances national profit maximization with aggressive local market penetration. His approach treats marketing as a P&L driver rather than a cost center, combining performance marketing rigor with brand building to create sustainable, scalable growth in a category where frequency is low but intent and trust are everything. Topics Discussed: Evolving from SEM-dependent marketing to an 11-channel diversified media mix Building local market penetration strategies that operate at calculated losses for long-term market share gains Creating profit maximization frameworks that determine exact incrementality points for media spend Positioning against word-of-mouth as the primary competitor in home services Leveraging AI and LLMs for content strategy, personalization, and agentic marketing systems Managing marketing team productivity and efficiency without headcount expansion Balancing performance marketing with brand building in low-frequency, high-stakes categories Optimizing for emerging search behaviors including AI Overviews and LLM-based queries