When you post articles here then Editors will review your article and then they will decide how much cash should be credited to your account as per the quality of the article
I have already written in detail in another post of yours. Please read FAQ by clicking at top of the screen and also go through revenue sharing program. The button is on the screen above.
As suggested by my fellow members you can earn cash by writing articles, taking part in member of the week contest, posting quizzes. Apart from these you can earn daily by posting the hightest number of quality comments on articles and ofcourse by taking part in polls and votings.