Can anyone please explain me about the things a copywriter needs to be aware of while he is writing, and also about the basic requirements for a copywriter? Is it compulsory for a copywriter to have an absolute knowledge of science? Also, please list some websites that teach or from where I can find information about copywriting. I would be grateful if anyone answers. Thanks in advance.
Try doing a search first. This question was asked and answered here at least twice in just the past week.
Google copywriting.. there's no secrets to being a basic copywriter. To be a great copywriter is something that is achieved over time and many articles. Good luck on your search. _http://en.wikipedia.org/wiki/Copywriting
It is asked here VERY often. And there are many different kinds of copywriters. Hang around and read some posts, so some searches, visit some blogs.