The Friends scope is the sixth lens after the Dash home in the lens bar and is represented by a speaking bubble. The Friends scope gives you access to your social media accounts.
You can use Super+G to open the Dash directly at the Friends Scope icon.
The lens will be blank until you enter your credentials in.
Right click on a search result to open a preview. The preview gives you more information and allows you to "like" or reshare posts.
Click Filter results to filter by account.