This document provides an overview of the role and structure of select committees in the UK House of Commons. It discusses that select committees examine specific subject areas like government departments, legislation, and domestic matters. Departmental select committees consist of at least 11 MPs from different parties who meet weekly to conduct inquiries through written evidence and public hearings. The goal is for committees to work collaboratively across party lines to scrutinize government work and issue reports and recommendations, to which the government must respond. The document offers advice for engaging with select committees by providing evidence, being available for briefings, and utilizing committee reports. It introduces the staff roles that support each committee's work.