Signal-Based Selling (SBS) is a GTM strategy that prioritizes outreach based on real-time buyer intent and situational signals. Instead of relying on static lists or generic firmographics, SBS focuses on who is most likely to buy, what they’re researching, and when they’re ready to engage. The article outlines the three pillars of actionable buying signals: Fit Signals (defining the ideal customer profile with firmographics, technographics, and verified contacts), Intent Signals (digital behavior indicating research or interest), and Situational Signals (company events like funding rounds or personnel changes). It also presents a 5-step playbook for building a signal-based selling framework: defining signal-to-action playbooks, acquiring accurate data, scoring and routing signals, personalizing outreach with context, and fostering GTM alignment among sales, marketing, and RevOps. The piece concludes by emphasizing that signal-based selling is essential for predictable revenue and improved sales efficiency in modern GTM organizations.