Personally I think either Facebook or Twitter.

Facebook because of pages, and the like button. It is just so easy. People use Facebook every day, so having them like your Facebook page and then posting updates gets your business in front of them quite easily.

Twitter, because it is so easy to network. One tweet can get you hundreds of clicks and views.

What do you think is the best?

wmf has a Facebook and a Twitter page, but I only spend time working with Twitter, "Facebook for grown-ups".

The only downside with the social networking sites is that the effusiveness of any links you place to your site only last a short while until it drops into the abyss.

Personally, I have found mixed results on Twitter, we get a few people come on board but it's mainly used as a way to engage with a wider audience, more immediately.

Each time I post a Twitter message, I see the website reporting we have 10 + guests on board, but that rarely matches Google Analytics, so I suspect a lot of those visitors are actually spiders - not been that bothered to check the web logs.   

I don't think Facebook does anything for your SEO, an important factor.

The effectiveness of a social media network still depends of how you use it for your SEO Management. Whether you are using twitter or Facebook the question how you implement them for creating traffics fro your site. But then you should not only focus on this for there are various strategies you can apply

Thanks for that Red.

For those wanting a good business based social media, LinkedIn is awesome.  There aree plenty of sector-based groups you can join and interact with, it's facebook for business.

I think we can say a social media is at it best once it succeed its purpose as a networking site. The way of how you optimize your website thru social media networks like facebook or twitter still depend of what purpose of them for you so the best social network vary from one person to another and to its purpose

One thing seems to be clear, businesses s are cutting down the bulwark between the business density and the social interaction. It is seen of how businesses are taking the opportunity of growing their venture through social media networks and connection.

I use both ,but till now I still can't find customers from facebook and twitter .Maybe there are still some problem about my setting.