can any one tell me how can i make money form the internet with the legal way and also increase my knowadge.also can any one tell me what is mean by the freelance?and how can we make money with the use of freelance sites?

Well, forum posting and blogging are handy jobs to enhance your knowledge skills. Freelance means a temporary job of whtever field you are freelancing in. Depending on the criteria, you can make money on freelancing sites easily.

Maybe you can learn the knowledge through internet, and after acquiring the advance science, the money will come to your pocket soon.

The possbilities of earning online are endless. All you need is a solid idea and the passion to back it up

You can make your own website or even just a blog. Get a lot of traffic into it and then monetize it thru a number of ways : PPC, Ad placements, sponsorships, etc.

A lot of big earners on the net started out with simple ideas and put their heart into it and eventually made it big

Freelancing is a way of earning at a per project basis. You can go for this if you have technical knowhow in web creation, content or article writing, etc. Anything that does not require you to be at an office on a regular basis is considered a freelance job. Best sites for this is scriptlance.com, getafreelancer.com, etc.. the list goes on - just google for this sites

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you haven't mention your skills, you have to invest something 1) money or 2) your skills.
In case you have money, you can have a website, can participate in affiliate marketing, can go for banner/space advertisments and so on
and if you are a skilled IT professional than you can freelance your skills at sites providing plateform to freelancers and service buyers. Just need to google the term freelance

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if you are good at referring, you should watch this: freedom.ws/cananito
:O for me so far is the best out there

You are good at selling but dont have an idea of what to sell..then the solution is to be an affiliate. cj.com, clickbank, etc..these are money making site.

You are good at writing, run your own blog, market it, get tons of traffic and sell sitewide link, post your articles and submit them to article directories. do a freelance reviews..

To list all, it is endless..all you need is to research and look around what and how people do business.

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Make a web site. put adsense on it. publish it for public. earn some good money.

I think the best way to earn money and enhance your knowlege is making money by posting . as you have to read before you post ,so you have to learn before you can share your ideas with others .
that's why I would like to take paid to post jobs.