This policy setting controls the Suggested Sites feature which recommends websites based on the user’s browsing activity. Suggested Sites reports a user’s browsing history to Microsoft to suggest sites that the user might want to visit.If you enable this policy setting the user is not prompted to enable Suggested Sites. The user’s browsing history is sent to Microsoft to produce suggestions.If you disable this policy setting the entry points and functionality associated with this feature are turned off.If you do not configure this policy setting the user can turn on and turn off the Suggested Sites feature.
Windows Components\Internet Explorer
At least Internet Explorer 8.0
HKLM\Software\Policies\Microsoft\Internet Explorer\Suggested Sites!Enabled