Hi,
I have a question regarding sanders. I have been watching some YouTube videos regarding sanding. I have heard that having a 1/4 sheet palm sander is a necessity and I am not sure why? I have been using a random orbital sander only for finish sanding my projects and getting very good results. Can someone shed some light on the reason (if any) on the importance of a palm sander? What do you well experienced woodworkers use and why?

Thank you,
Steve