ITIL (Information Technology Infrastructure Library) is a globally recognized framework providing best practices for IT Service Management (ITSM), helping organizations manage IT services, align with business goals, and improve customer satisfaction through structured processes and guiding principles, with modern versions like ITIL 4 integrating Agile, DevOps, and Lean concepts for digital service management. It offers certifications for IT professionals, starting with Foundation and progressing to Managing Professional (MP) or Strategic Leader (SL) paths, validating skills in creating value and ensuring efficient, resilient IT operations.