Sitemaps:

[romaro]

Hello, doing an audit found in our sitemaps the tag which at the time was to say that the url was mobile. In our case the URL is the same for desktop and mobile.
Do you recommend leaving or removing it?
Thank you!

[bridget.randolph]

Hi romaro,

From my understanding, using these tags as part of a mobile XML sitemap is not necessary and in fact, Google don't recommend having a separate mobile sitemap: https://www.seroundtable.com/google-mobile-sitemaps-20137.html

Instead, for a dynamically served site, the important things are:

• Use the Vary HTTP header to signal your changes depending on the user-agent.
• Detect user-agent strings correctly.

You can read more about Google's guidelines for dynamic serving here: https://developers.google.com/search/mobile-sites/mobile-seo/dynamic-serving

[Roman-Delcarmen]

Google uses XML schemas to define the elements and attributes that can appear in your Sitemap file. A Sitemap may contain both core Sitemap elements and elements specific to Mobile.

So it defines which elements are tagged for mobiles

If my answer were useful don't forget to mark it as a good answer
Cheers

[romaro]

Hello Roman, thanks for your answer.
We are a marketplace and do not use bootstrap and AMP, we use dynamic code to display the mobile or desktop version (not responsive), but the URL is the same.

What is the benefit of the <mobile: mobile="">tag in the Sitemap?</mobile:>

[Roman-Delcarmen]

Depends on how you have set up your website, I will assume that you use Bootstrap on AMP, so if the tag is used to trigger some elements or hide others based on the users device maybe is not a good idea to touch it.