I usually do it twice for my posts, once as blogger labels and then Technorati tags. So why all the fuss? may be just to organize one self, many selves!
But an article I read today says there is more to this tagging and labeling. Heidi Cohen, who teaches in New York University's Masters Program in Direct and Interactive Marketing, says in her ClickZ column (I learned about Heidi's column at Press-feed)that what makes social bookmarking importnat to marketers is that it's another cost-effective way to augment search marketing efforts, distribute content, and aid branding.
Social bookmarks are links allowing users to store, classify, share, and search content through a process known as tagging. Tags are a user-generated taxonomy that makes information easier to find. Social bookmarks can be applied to various types of content, including Web sites, blogs, PDFs, audio, video, photos, and tools.
Major social bookmarking sites include del.icio.us, Furl, StumbleUpon, and Google Bookmarks. TopRank Online Marketing CEO Lee Odden suggests adding commentary to bookmarks to aid search within the social media site. Social news sites such as Digg and reddit are often counted in this category. These sites can be important for reputation management and branding, notes SEOmoz CEO Rand Fishkin. To mitigate the effect of negative information about your company, create articles portraying your firm in a positive light and optimize them on these sites.And it seems that all these should end up in RSS Feeds. Feedotopia, will take you to utopia of feeds, soon!