For the design team, you'll want their goals to be related to the conversion rate on the website. It's their jobs to make the site aesthetically pleasing and easy for customers to use.
The social media team will be responsible for driving traffic to the site, so you'll likely want to keep an eye on total traffic to the site, particularly from Social Networks (fairly easy to find in Google Analytics, as an example), and things like Facebook Like's, Twitter followers, Pinterest, etc. Facebook does have their own Insights platform, so you'd likely want to check into that as well.
The Web Development team will be responsible for the functionality of the website, so you could boil it down to something as simple uptime. But there's also important metrics like site speed which are easily measurable which they should always keep in mind when planning.
The "creative" division, which I'm sort of picturing as the Internet Marketing Management team should keep it simple and have basic ROI (return on investment) targets. If they're in charge of the overall project management, then they should be held accountable for the resources that they're managing (the team) and what the company is getting out of those resources.
Obviously this answer is subjective, but I hope it provides you with a good starting point.