# Disallow everything.
User-agent: *
Disallow: /

# Certain social media sites are whitelisted to allow crawlers to access page markup when links to /images are shared. 
User-agent: Twitterbot
Allow: /

User-agent: facebookexternalhit
Allow: /

User-agent: Googlebot
Disallow:

User-agent: AdsBot-Google
Disallow:

User-agent: Googlebot-Image
Disallow: