How many emails do we need about Cultural Naviagtor? Seriously. Don't trust sharing anything with this company. Recommend everyone change their settings to not share with others -- not colleagues, not teams, not administrators -- no one.
Everything this company does is for their benefit. I'm pretty sure they'll use the data to rank you and/or push you out.
If you want to know why CN was introduced, looked at reason for everything else WF has done.