I want to learn about search engine optimization,social media marketing,affiliat marketing,is there any source?

[Faisal]

is there any good site available from where I can learn?

[Jake]

There are many new marketers hanging around at Warriorforum, they have some low cost, mixed quality tutorials in the WSO section.

An SEO authority has a nice compilation of learning resources here:

http://www.seomoz.org/dp/the-internet-ma...g-handbook

[Dexter Abraham]

I am in agreement that the majority of what you want to learn can be learned for FREE online.

However because of the vast amount of information I suggest you prepare to manage the information first.

I would create a seperate email just for the lists you will sign up for.

I would create folders for the different topics.

[Anuj Kumar]

for basic seo you can learn from http://tools.seobook.com/

[Maria]

Best way to learn about search engine optimization is to learn it online if you want for free.
Some institutes also offer Google certified courses.