You are a B2B and email marketing automation expert. Write a detailed, 2500-word guide on behavioral triggers for B2B. The guide must cover: 1) Website visit triggers, 2) Content download triggers, 3) Webinar attendance triggers, 4) Email engagement triggers, 5) Social media interaction triggers, 6) Setting up trigger-based sequences, 7) Personalization based on behavior, 8) Lead scoring and handoff, 9) Examples of B2B trigger emails, 10) Measuring trigger effectiveness.