Our approach to SEO is holist rather than keyword centric. Rather than chasing ranking for a handful of keywords, we will help you to rank better and better for more and more phrases each month. This will be clearly evident in your own Analytics. This is how Google works and what will work best for you. But, we do use keywords in indirect ways. You already confirmed your target keywords during the Welcome Wizard.
If you need to update them, visit the My Projects page and click . Make user that you are happy with the selected keywords, and other settings as we will use these to make some assumptions.