Meta tag for geolocation

I'll answer as far as I know about your question, haha Google that owns 45% of searches on the internet, does not recognize this meta tag. The ones he recognizes are here: link I've seen people using these tags (although they do not know much about it) and if they really are useful for your project, use them!

For what I researched the tag exists, the point is that it is not an official standard.

In the wiki, explain a bit about the pattern: link

As a matter of doubt, if your project is to benefit from this information, it is interesting to use even if not all search engines use it, so when they use your project, it will already be working with it.

Apparently based on the given answers and provided links, these metatags are not considered by all engines, especially by Google, according to Giancarlo Soldera Graziano's answer, and there is little material available about it.

The reason I wanted these tags is in the original question:

  

.... to help search engines know that the information on my site refers to a specific city.

Trying to find the answer, I came across another concept: structured data . I know I did not ask about it, but it's because I did not know it existed, and in fact that's what I was looking for, but I did not know.

Using structured data, I can tell Google (key search engine) valuable information about my site, including the latitude and longitude that was asked.

This site generates the structured data script. It will deliver you a script of type application/ld+json that you place on head of your page. Here is an example that I generated on this site:

<script type='application/ld+json'> 
{
  "@context": "http://www.schema.org",
  "@type": "Bakery",
  "name": "Minha Padaria",
  "url": "www.minhapadaria.com.br",
  "description": "Essa é a descrição da minha padaria",
  "address": {
    "@type": "PostalAddress",
    "streetAddress": "Rua da Padaria, 29",
    "addressLocality": "São Paulo",
    "addressRegion": "SP",
    "postalCode": "00000-000",
    "addressCountry": "Brazil"
  },
  "geo": {
    "@type": "GeoCoordinates",
    "latitude": "38.844573",
    "longitude": "-77.286766"
  },
  "openingHours": "Mo, Tu, We, Th, Fr, Sa 06:30-20:00",
  "contactPoint": {
    "@type": "ContactPoint",
    "telephone": "+55(11)0000-0000"
  }
}
</script>

There are other sites that generate this, such as:

link

link