What ciao is all about? PLS HELP? DONOT IGNORE?

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I have recently registered with Ciao and i have gone thru its faqs and guidelines also. But it is not clear to me yet. I want to write reviews in it but how to start. Is it to do under some category or should write the review straight about anything. What is product rating or review rating. Pls explain. I atleast want to start. pls reply.