How to use rel="alternate" properly for mobile directory.

[absoauto]

Hey everyone,

For the URL - http://www.absoluteautomation.ca/dakota-alert-dcpa-p/dkdcpa2500.htm - I have the following tags in the header:

rel="canonical" href="http://www.absoluteautomation.ca/dakota-alert-dcpa-p/dkdcpa2500.htm" />

rel="alternate" media="only screen and (max-width: 640px)" href="http://www.absoluteautomation.ca/mobile/Product.aspx?id=37564" />

Yes Google WMT is reading these as duplicate pages with duplicate titles, meta descriptions etc.

How can I fix this? Thanks!

[Critical_Mass]

Hi there! It looks like both these tags are present on the same URL, your desktop version. The rel="canonical" tag should be implemented on the mobile version of the page instead, and only the rel="alternate" tag should be kept on the desktop versions. This is how you signal the bidirectional, or two-way, relationship to Google. Hope that helps!