Quest Giver: Chadley
Reward: 1x Assess Materia
Chadley is that weird kid that talks like a robot. He gives you the Assess Materia which provides the ability to scan monsters for valuable tactical information (e.g strategy, strengths, weaknesses, immunities, absorptions, etc). He then requests Cloud to scan monsters he encounters in order to generate battle intel for him.
Chadley is how you unlock certain Materia and even summons throughout the game by completing the Battle Intel assignments he gives you. For this first one, you only need to scan two different types of monsters. After you do, return to him to buy the Auto-Cure Materia at a discounted rate.