I think that many sites have social bookmarking plugins these days, and put them on all pages of their site. How does that affect SEO? Is it good to have 6-10 social bookmarking sites, linking to them, just so that someone can click and submit it... tho they probably won't do that. It just increases the number of your outbound links. What do you think about that?
this is totally for the user so they can easily link and share your content. it does not have direct effect on seo just being on the page
Make sure the social bookmarking sites you 're going to add don't take away link juice from your site.
I recommend just use the effective do follow social bookmarking site with the combination of SU and delicious..