My “Professional Image Building” teacher in college shared this link with me, which I thought was very informative!
You may have a personal portfolio website for a number of reasons. If you’re a freelancer, then you’d need one to showcase your work and allow people to contact you. If you’re a (or unemployed), then you’d need one to show prospective employers how good you are and what you can do, so that they might hire you. If you’re part of a studio, then you might use one to blog about your design life, show people what you’re doing and build your online presence.