Please reply some advice that help me 
Hello Munna…
For learning SEO online you must read various articles on SEO and also there are various sites which will give you alot of information about SEO…
You must surf net and collect more and more data related to seo and you will get the desired result…
This question has been asked and answered many, many times before. Please read the SEO FAQ or use the [url=http://www.sitepoint.com/forums/search.php]Search facility to find past discussions.
If, after reading those, you’ve still got any specific questions that haven’t been answered, please do come back and start a new thread. In the meantime, I’m closing this one.