what is the purpose social media site actually?

There's a lot of social media site in the line...but some of it has its uniqueness like mashable, digg, delicious but other than that there is lot of sites coming day by day are they use this site to earn money or they just create it for some other purpose?

And is it possible to earn from it?? and how??

 

If you are running the online business then the social media sites stands for "marketing" for you.

 

Social Media site actually used for share your website information to others. Because peoples are connected to each other through social media and know the relevant information as per requirements.

 

I think banner advertisements and some ppc campaigns some site owners earn money from that kind of online business.

 

if u have a business or ur own site to publish ang get lot of traffic then social media will definitely help to increase traffic and the number of visitors to your site.
social media like facebook twitter linkedin etc etc al help to popularize your content. and yes u can make money with it.
all the best

 

In general it means to share your ideas and expressions; For Politics it means revolutionizing some movement and for business it certainly means to promote your product or your identity

 

social media website is a site where people can get together and interact with each other. You can make money based on how much traffic you will get, and if you have a unique developed social media site you can sell it to other social media startups.

 

Social media site is communicate to each other people.

 

social media sites works good for communicating between many people.It also a great platform where we can promote our sites and services also.

 

Pinterest was one of those dime a dozen social media sites that hit it big. For every 20 or 30 new social sites out there, one of them is going to go nova.

 

The purpose of social media sites are:
To interact with other people globally,
Business promotion

 

Social media enables one to connect and build relationships and stay in touch with loved ones abroad. I definitely agree with the business side of social media.

 

To share your like and dislikes socially (with others) and many of these sites give you option to keep your sharing private.

 

If you are talking about social bookmarking then it is all about bookmarking online.

 

I think social media helps a lot to get good traffic.
And social media helps in online business too.

 

Social media sites serve as a good marketing tool for businesses nowadays since millions of people are using the Internet on a daily basis. It is good for companies who are into online business.

 

Yes,nowadays people use social media for business promotions and advertisements

 

Is it good to do SMO in niche social networking sites??

 

users see social sites as a place to make friends and share their thoughts where as businesses follow them there believing 'be there where customers are'.

 

As far as I know, social sites try to collect personal information from their members like address, gender, age, occupation, income, education, etc. Some of those type of sites may categorize the members based on the content of the sites they like. Then some of those sites like facebook may sell highly targeted ads directly to advertisers.
Advertisers like to buy targeted ads as targeted ads convert better. Better targeted ads usually generate more sales/conversions than slightly targeted ads. This might be the method how those type of sites make money. Of course, this method may work well only for big, popular sites with thousands of active members. Most of the people may find risky to buy ads from a fresh site unless there is an intermediary like adsense, adbrite, etc.