The European Tourism Indicator System Toolkit, commissioned by the European Commission, aims to support sustainable management of tourism destinations by providing a set of indicators, a toolkit, and a dataset for monitoring and improving sustainability practices. It underscores the importance of collaboration among local stakeholders and encourages informed decision-making for enhancing the competitiveness and sustainability of the tourism sector. This toolkit includes a step-by-step guide for implementation, covering awareness, data collection, stakeholder engagement, and the use of core and optional indicators.