This should be two or three sentences with some key points about who you are, what credentials you have and why you do what you do. Start with a strong personal statement, then zoom out and give potential clients more context.
Three to four sentences describing your overall offering and its benefits. Keep things conversational, inspirational, and top level; this is a place to really distill what is most important and most enticing about your services. In a nutshell, what are you offering and how will it improve the lives of your potential clients?