Whether people can find you

Set these in Settings → Privacy & audience:

• Let people find me by email: when on, people with your email address in their contacts can find you. Accounts under 18 are never shown.
• Let people find you by searching: when off, you won't show up for people who don't already follow you.
• Show you in suggestions: when off, you won't appear in "You may know" or "Who to follow".