Does Social Bookmarking really helps??

[ksmith29]

Yes, It does help out but don’t expect great results. Most these sites do have high DA but either they no-follow the link or the PA of the page is too low for any significant effect to your rankings.

These can be considered as pillow links.

It does help in SEO Efforts but only a bit

DA/PA has nothing to do with the SERP's.