Your summary is a personal introduction for recruiters, so start with a great headline and opening statement. The recommended formula for your introduction summary is to say what you are, say who you are, say why you make work/life better and give proof that substantiates it.
It's also the best place to add keywords — specific terms or phrases to identify your skills, qualifications, industry insights or professional attributes relevant to your career or job search. Keywords make it easier for human recruiters and automated screening tools to evaluate your essential qualifications. Consider what types of roles you're looking for and appropriately highlight your skills. Finance and accounting professionals might work in terms like "Advanced Excel" or "advanced modeling techniques," for example.