This lesson introduces the four key levers through which digitalisation can support sustainable tourism management: Data, Resources, Flows & Mobility, and Trust-first Communication. It explains how each lever can help destinations address specific sustainability challenges, from monitoring visitor behaviour and managing water or energy use to improving mobility choices and communicating transparently with visitors. The lesson also introduces basic KPI logic, helping learners understand how digital tools should be connected to measurable outcomes. Finally, it presents the Select → Pilot → Scale approach as a practical pathway for choosing, testing, and expanding digital solutions in destination management.