1. Facebook.com : The best social media optimization site with millions of active users. You can get high quality traffic and no follow backlinks from Facebook.

2: Twitter - The best social media site for professionals , you can share your messages publicly with 140 character limit . Its a good way of getting pr 10 backlink .

3. Digg : It is a social bookmarking site and currently very popular in social media optimization field.

4.Stumble - It is the best collection of cool websites and hence it is best social bookmarking website for new users.

5 . LinkedIn - IT is a social network for corporate world and job seekers.

Google+
Twitter
Facebook
Instagram
LinkDin

Top 5 SMO sites
1. Facebook
2. Twitter
3. Google+
4. Linkedin
5. Pinterest

1. Facebook.com
2. Twitter
3. Digg
4. Stumble
5. LinkedIn
6. Reddit

Fine below best Social Media Sites:-

1. Facebook
2. Twitter
3. LinkeDin
4. Instragram

Facebook,Twitter,Google Plus......

in my opinion, facebook, google plus, twitter, pinterest are the best smo sites to apply. i used these 4 ones for the smo for my work.

the main sites are listed below.
1. fb
2. google plus
3. twitter
4. Pinterest

Shipping and logistics courses

The best SMO sites were
1. Google plus
2. Facebook
3. Twitter