User-agent: *
Allow: /

User-agent: Mediapartners-Google
Allow: /

User-agent: Googlebot
Allow: /

User-agent: Adsbot-Google
Allow: /

User-agent: Googlebot-Image
Allow: /

User-agent: Googlebot-Mobile
Allow: /

User-agent: *
Disallow: /?ref=
Disallow: /*ref=*
Disallow: /*?ref=
Disallow: /?ref=