有益 means 'beneficial' — it emphasizes longer-term, holistic benefit (e.g., for health, learning). It is more formal than 有用 (yǒu yòng, 'useful in a practical way') and has a wider scope than 管用 (guǎn yòng, 'effective for a specific task'). 有利 (yǒu lì) is 'advantageous / favorable' and focuses on situational gain, not inherent value.