Personal branding is about marketing yourself and your career as a brand. It involves developing an identity through your name, reputation, skills and how others perceive you based on what you do. Personal branding is valuable because perceptions define us, and building a unique personal brand portfolio through your online profile and references can help differentiate you and show what problems you solve. The key takeaways are that you are a brand defined by your actions, and it's important how people know you rather than just how many people know you.