Google mobile friendly icon

Question

What should I do to have Google mobile friendly icon in Google search results of my page? Should I limit page width regarding to screen size? Send mobile headers? Or?

Answer 1

There are several ways to get your site more likely to appear with a green mobile icon on Google's search results:

• Submit a mobile sitemap to Google. More information here.
• Provide an XHTML mobile mimetype
• Use XHTML mobile header on your pages.
• Create a mobile stylesheet
• Include mobile related information in the website.

And from Google's very own website they say:

Valid pages are likely to render correctly on more mobile devices. Source

And that basiclly means "make sure your syntax is valid".