I am into G+ now. Because you do not need different profiles anymore. Create group who you wana put in a particular niche.
I suggest Facebook and twitter. Those have millions of subscribers and everyday there many people who view these sites.
Twitter is working great at the moment for me! It's easy to get followers if you have a good service/business up and running. You can keep them updated and reach out to thousands of new customers every time you actually tweet something. Twitters doing amazing at the moment for lots of people and companies.
Use facebook and twitter together. Also, try to use pinterest, you can get a lot of traffic from there
I'm Into Friendly which is a very friendly site. and its fun talking with the same nationality by the way. Its a Philippine based Social Network and its fun! Here is the link if you want to try it. there are allot of filipinos registered already and soon they will create a Job section where you can post jobs/microjobs or anything. http://friendly.ph
and all so a small web site is www.laknaa.com lol im just saying,its a social network for buying and selling
Facebook , twitter , pinterest ,linkedin and lot more ... Personally i believes that linkedin is the best social networking site for get in touch with Professionals and can learn many of things and aware about market updates . Also , you can join groups and participating in discussion , , promotion activities , comment on particular .
i wouldnt want buisness on facebook, because that is for peoples lives. if people want to subscribe to my sites twitter, they can. they will. they do.
MySpace, Facebook, Second Life, YouTube, etc. These websites have rocketed to the top of the most visited website list in a very short time and continue to increase in popularity. The great advantage of social networks to marketing is their tendency to propagate information virally.