This study explores the current and future flexibility needs in the electricity system as well as existing and potential solutions to efficiently integrate renewable energy and facilitate electrification of end-uses. Key findings highlight the importance of flexible electricity generation, demand response and energy storage solutions for daily, weekly, and seasonal flexibility provision. However, challenges persist due to inadequate market rules and regulatory frameworks, and economic issues. The study recommends additional policy measures to enhance system flexibility, complementing ongoing policy initiatives at the EU and national level. This document was provided by the Policy Department for Transformation, Innovation and Health for the Committee on Industry, Research and Energy (ITRE).