[QUESTION] Show or hide TAGS?

Suppose I posted an article on my site, and it shows tags on the bottom. Does it matter if the tags or showing or not for SEO? What do search engines want? Does it matter if the tags are hidden?

Please explain.. Thanks in advance

I would usually avoid using tags unless I am running a very very large site with hundreds of articles. Tags are supposed to make it easier for articles to be grouped and discovered. On smaller sites, they could result in duplicate content throughout your site.