Description, keyword and similar tags by themselves won’t rank your site higher. You can fill the tags up any way you want, but if they don’t match the content of your site, you won’t rank higher and even run a small risk of attracting Google’s wrath for “fiddling”.
If you are running a business in a specific area, the geo tags are of almost vital importance.
However, if your site does not have useful and unique content, no amount of whitehat seo will rank you #1.