They're important. They either build reputation capital that becomes an asset for you or they prove to be a liability to the amount or quality of future business.

Your reviews might also very well deter or invite prospect new talent to your company.

Your character is revealed by the quality of the reviews and the relationship you show (people are watching) people you have with customers/clients and prospects.

You are also judged by the poise, or lack of it, and the character, ethics, professionalism, sensitivity and empathy, or lack of all that in interactions online with happy and dissatisfied people both. Something invaluable to remember.