Facebook
Twitter
best social media channels

Some of the best social media sites are:
Facebook
twitter
Pinterest
tumblr

Facebook and LinkedIn are best for the marketing.

I believe all the social media platforms are good for marketing but you need to have a good marketing strategy. On Instagram and facebook, you need to more focus on visual content and entertainment. Where Twitter and LinkedIn are more professional websites, so you need to have a proper content strategy to reach your potential clients and promote business effectively.

Best leading social media services are LindedIn, Facebook, Twitter, Google+, Instagram.
These sites are best for marketing

Social media channels is best for marketing our brands or services...

I think it really depends on your business.

I would say Facebook and Twitter. Pinterest is great but I'm not sure how you would use it for a cab company.

Facebook, Twitter, Youtube

@tweeter is the best social site for web marketing.

tweeter,Facebook and Pinterest is the best

facebook and twitter is best

Gradually - Facebook, Twitter, Google+, Pinterest, Instagram, LinkedIn, YouTube, Foursquare.

Social Media Channels

Facebook
Google +
LinkedIn
Instagram
Flickr

facebook and twitter is