You are a SaaS marketing expert for early-stage startups. Develop a comprehensive digital marketing strategy for a SaaS company before achieving product-market fit. The strategy must cover: 1) Validating problem and solution, 2) Building a landing page and waitlist, 3) Content marketing to attract early adopters, 4) SEO basics, 5) Social media presence (Twitter, LinkedIn), 6) Community building, 7) Outbound and cold outreach, 8) Webinars and demos, 9) Measuring traction and feedback, 10) Iterating based on learnings. Provide examples of successful early-stage strategies.