Answer:
Personal development is a processfor people to assess their skills and qualities, consider their aims in life.
Personal development is an ultimate necessity: "The extent to which people are able to develop depends on certain needs being met and these needs form a hierarchy. Only when one level of need is satisfied can a higher one be developed". You can also consult Abrahma Maslow's Hierarchy Needs to deep in its importance.
Reference: 2011-2019, (c) Copyright SkillsYouNeed.com. “What Is Personal Development?” SkillsYouNeed, 2017