Google's new Preferred Sites feature allows users to set their web search preferences so that the search results match their unique tastes and needs when logged into their Google account.
Users can add sites they trust for certain types of information, add local sites for news that's more relevant to them, or add their favorite blogs and save their preferences. Users can edit their preferred sites list at the bottom of the Google Preferences page. You have to be signed in to your Google Account to use preferred sites.
Google uses the user's Web History to suggest sites users might like to include or the users can directly add/remove the URLs of the sites they prefer. Users will be able to see the label My preferred site next to results from these sites in their search results as below.
Users can help improve this feature by joining the Preferred Sites discussion group.