Selected answers from the Dumb SEO Questions Facebook & G+ community.
Andres Felipe Echavarria Henao: Hey guys, I hope you are doing well, I started to see that my m.site pages are indexed in desktop SERP, is this ok?
Dave Elliott: here is google's advice on the subject. https://developers.google.com/webmasters/mobile-sites/mobile-seo/separate-urls . You need to do a bit of canonicalisation and use rel="alternate".
Andres Felipe Echavarria Henao: Thanks Dave, I´m asking because I saw that zappos doesn´t have the alternate tag, and I can see all them m.pages indexed