According to various sources GEO Meta Tags are ignored by the standard Google search. Example for GEO Meta Tags:
<meta name=”geo.region” content=”DE-BY” /> <meta name=”geo.placename” content=”München” /> <meta name=”geo.position” content=”48.169822;11.601171″ /> <meta name=”ICBM” content=”48.169822, 11.601171″ />
Still there are some search engines or other services which may very well respect them. It might be useful for a local restaurant or business to use them for SEO.
On the other hand I wonder if there are search engines which respect geolocation data which may rank you worse if you are far away. For a local business this is probably not a problem. For the corporate website of a company or and online shop this would be very harmful. Anybody having information on this?