Great question. A recent Vanguard study suggests an advisor can add value through relationship-oriented services such as financial planning and behavioral coaching. Humans have built-in behavioral biases that can lead to financial mistakes. The study suggests a good advisor can add as much as 3% of increased investment returns through behavioral coaching and other factors such tax reduction, mitigating your overall risk of financial loss, and portfolio asset location and periodic rebalancing between asset classes.
CFP® professionals represent a high level of competency, ethics and professionalism. Many advisors hold themselves out as a "financial planner;" however, only those who have fulfilled the certification requirements of the CFP Board can display the certification marks. See more at: CFP Board