I've used 2 different theme but again same problem. Tags below the post doesn't seem on my wordpress blog. I am writing my tags but they are not showing up. I've tried a lot of thing but I couldn't it. I'm looking for a clear solution. Thanks.
Not every theme is set up to show tags at the bottom of the post. Some show them elsewhere, below the comments, and some don't do it at all. I thought it was a basic function of wordpress too, but I have had the same problem. I use http://www.prelovac.com/vladimir/wordpress-plugins/seo-smart-links, and it does all that for me, plus some very beneficial SEO functions for your blog.
Open index.php in you theme folder and search for "the_tags". Put this under the content function to show tags: <?php the_tags(); ?>
You are probably missing the call for tags in the theme. The template tag for tags is this: <p><?php the_tags(); ?></p> PHP: Now you might want to add something to it like this: <?php if (function_exists('the_tags')) { ?><strong>Tags: </strong><?php the_tags('', ', ', ''); ?><br /><?php } ?> PHP: The file and where to place it can be tricky, it should at least go on the single.php file after the post and before the comments and even on the index.php file if you want to show them on the main blog page. As I said it's a bit tricky to say where to put the code because all themes are so different. More on the Codex here: http://codex.wordpress.org/Template_Tags/the_tags
"the_tags" template MUST put inside the loop, and its most placed on single.php. Open your single.php file and put this default code: <?php the_tags(); ?> where you want your tags appear, most user placed the_tags code just under <?php the_content(); ?>. Just visit http://greatimaginative.com/1 to see how its work perfectly at my blog (scroll down your screen and click on "Tags" tab). Good luck.
all are giving u good suggestion about editing ur functions and theme files for showing tags manually. ensure how it is in demo. if in demo they are not exist then add them manually. If problem still then switch to another. Something same happened 3 times with one really cool client of mine.