ShipScript has been an eBay Community volunteer since 2003, specializing in HTML, CSS, Scripts, Photos, Active Content, Technical Solutions, and online Seller Tools.
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I looked at your most recent listing, assuming that is the one used for your screenshot.
https://ebay.com/itm/192949665613
It does not contain any "mobile friendly" meta tags. eBay did not add them. Instead, eBay correctly determined that your listing does not need them because you do not have any embedded photos or complex HTML.
Most of the new listings that sellers create without listing tools will not need the "mobile friendly" tags.
On the other hand, embedded photos down in the description will still require the image style tag somewhere in the description.
<style>img {max-width:100%;}</style>
The "mobile friendly" viewport meta tag, would be added to a custom design only AFTER the seller has added all the code necessary to create a flexible page design.
<meta name="viewport" content="width=device-width, initial-scale=1.0">
The viewport meta tag does not make a page mobile friendly. The viewport meta tag is only an advisory to the browser, telling the browser the page has already been made flexible, so don't try to shrink the page.
A plain text listing with very simply HTML has no structure that prevents it from flexing or wordwrapping, and has no images that need to be made resizable. Thus, adding the two tags would be superfluous. They don't really do anything. But they don't hurt either.
I looked at your most recent listing, assuming that is the one used for your screenshot.
https://ebay.com/itm/192949665613
It does not contain any "mobile friendly" meta tags. eBay did not add them. Instead, eBay correctly determined that your listing does not need them because you do not have any embedded photos or complex HTML.
Most of the new listings that sellers create without listing tools will not need the "mobile friendly" tags.
On the other hand, embedded photos down in the description will still require the image style tag somewhere in the description.
<style>img {max-width:100%;}</style>
The "mobile friendly" viewport meta tag, would be added to a custom design only AFTER the seller has added all the code necessary to create a flexible page design.
<meta name="viewport" content="width=device-width, initial-scale=1.0">
The viewport meta tag does not make a page mobile friendly. The viewport meta tag is only an advisory to the browser, telling the browser the page has already been made flexible, so don't try to shrink the page.
A plain text listing with very simply HTML has no structure that prevents it from flexing or wordwrapping, and has no images that need to be made resizable. Thus, adding the two tags would be superfluous. They don't really do anything. But they don't hurt either.
@mcdougle4248 wrote:
Does anyone know if the mobile-friendly checker has been updated? Or is it glitchy again?
I just created a new listing and the meta tag (or whatever it is called) that usually needs to be added when I click on the mobile-friendly checker is no longer an option to add. So, I do not know if that tag is missing from this listing or it was automatically added.
Hi @mcdougle4248, this was actually updated today! Ssellers that are not using custom HTML in their descriptions no longer need to add the viewport meta tag to make their listing mobile friendly. Listings viewed through a mobile device will be mobile friendly by default.
I looked at several of your newly listed items from the past few days. Some have the tags and some don't. Because of the sprinkling, I will assume some are relists and already had the tags. None of the ones I reviewed needed the tags.
Thank you for the clarification. This a great update!
On a side note, I think this is one of those updates posters often speak of that should be announced somewhere to save sellers time hunting down the answer 
