reddit is help your search ranking .

Offcourse social media promotes our page or sites but i don't know whether it gives dofollow or nofollow links.

Worth it. Social media always brings good traffic when search engines are not looking.

Yes social signals are playing vital role in ranking your websites more number of shares to your article better is the probability getting ranked better

whatsappmessages.net/last-moment-photo-of-dr-apj-abdul-kalam

Check out this post of mine very less content and still ranking good for the keyword "last minute pic of apj abdul kalam"

Social media is 100% worth...

Social media engagement assist to generate traffic, it has nothing to do with your website ranking.

I am thankful to those who answered the post. I am new here and have the same questions like what SusanKing had. I just want also to promote my site.

thank you so much for all detail

facebook and google
 

facebook and google + no.1 in socila network

Social media provide good website traffic that can help improve your website ranking. The social media such as Facebook, G+, Twitter are best for marketing.