Canonical and Alternate Advice

[BlueprintMarketing]

What URLs are you  using with the “alternate” tag on?

You said 
”1. We have multiple brand sites, that have a similar setup. They all have mobile and desktop versions of the sites running on the same URL, both of which show the same content.

2. The server determines whether if you're on a desktop or mobile devices using the header information, and points the user to the site relevant files for the given device.”

thats Dynamic serving same URL

Dynamic serving is a setup where the server responds with different HTML (and CSS) on the same URL depending on which user agent requests the page (mobile, tablet, or desktop).

that would NOT give you the mobile or m.example.com & www.example.com different URLs

**But If you do have  a different  m.example.com & www.example.com  URLs you should use this code or  XML site maps **

for different URLs use this:

Annotations in the HTML

On the desktop page (http://www.example.com/page-1), add the following annotation:

<linkrel="alternate"media="only screen="" and="" (max-width:="" 640px)"<="" span="">href="http://m.example.com/page-1"></linkrel="alternate"media="only>

On the mobile page (http://m.example.com/page-1), the required annotation should be:

<linkrel="canonical"href="http: www.example.com="" page-1"=""></linkrel="canonical"href="http:>

This rel="canonical" tag on the mobile URL pointing to the desktop page is required.

Or

Annotations in sitemaps

We support including the rel="alternate"annotation for the desktop pages in sitemaps like this:

<urlsetxmlns="http: www.sitemaps.org="" schemas="" sitemap="" 0.9"<="" span="">xmlns:xhtml="http://www.w3.org/1999/xhtml">

<loc>http://www.example.com/page-1/</loc>
<xhtml:linkrel="alternate"media="only screen="" and="" (max-width:="" 640px)"<="" span="">href="http://m.example.com/page-1"/></xhtml:linkrel="alternate"media="only></urlsetxmlns="http:>

You should have the same URL on mobile and desktop

You should have the same rel canonical tag on your URLs unless and this is a big unless you're talking about using Google AMP?

If the URL you want to be indexed is the same URL point everything to that URL if that makes it easier to understand.

respectfully,

Tom

[BlueprintMarketing]

The single self-referencing URL will work.

[JH_OffLimits]

So both mobile and desktop require a self referencing canonical(in both headers)?

Sorry for the questions, just need to make sure! It's a very touchy subject!

[BlueprintMarketing]

Hey man I understand is a big deal

could you do me a huge favor and run your site through screaming frog SEO spider send me a couple of pages with the domains whited out so I can tell you 100% what to do in this situation because I am basing this on what you have told me and honestly I would like to look at what a tool can show me and that will tell me what I need to do.

Or you can tell me if the mobile version of the site hit's Google's index yes or no?

respectfully,

Tom

[JH_OffLimits]

I've been told to pass on a URL, thanks for your help Thomas!

https://www.stag.com/

[BlueprintMarketing]

Use a self-referencing canonical

https://blog.seoprofiler.com/google-recommend-self-referencing-canonical-tags/

Please let me know if you want me to remove the image below?

you can use this one if needed http://bseo.io/c1vMSv

mgkic5E.png

[Nigel_Carr]

Hi JH

I'm sure Thomas means well with his multiple complicated posts but all of this is totally unnecessary.

Both sites are serving the same URL

You can't put a rel=alternative because there is nothing to point to.

Just put a self-referencing canonical. I said that 2 hours ago!

That is all.

Regards Nigel

[JH_OffLimits]

So a self referencing canonical on both mobile and desktop versions of the site, regardless if they chuck out two version with the same content?

[BlueprintMarketing]

Sorry Nigel

was not trying to make this more complicated was just trying to make sure that we were all on the same page.

FYI if you need a method of adding the rel canonical to your website quickly you can use Google tag manager or if you want to add to the header

https://support.stackpath.com/hc/en-us/articles/360001445283-EdgeRules-Adding-a-Canonical-Header

[Nigel_Carr]

There is only ONE URL that is the point.

If they share the same URL then you only have one page of code so ONE canonical

Regards

Nigel

[Nigel_Carr]

The reason we answered 'quickly' by the way is because we are in the UK -  you were still in bed lol!

[BlueprintMarketing]

That would normally be the case but not tonight.

LOL, I am picking up a lot of the UK Q&A I will be at BrightonSEO and search love London if any of you guys will be in the area I'd love to grab a pint?

sincerely,

Thomas