It lets you share your content with a select group of friends. To use: Settings > Account > Close Friends.
It blocks incoming friend requests. To use: Settings> Privacy> Messages> Potential connections> Don’t receive requests.
It blocks offensive messages and comments. To use: Settings> Privacy> Hidden Words.
It limits chats for a period of time by automatically hiding comments, message requests from people who don’t follow you.
It lets you control who can send you direct messages, block unwanted messages and see your active status.
It lets you restrict who can add you to a group. To use: Settings>Privacy>Messages>Group Settings>Who Can add you to groups.
It sets up two layers of security for accessing your account. To use: Settings> Security> Two factor authentication.