For those who offer Article Marketing, where do you place your keywords so as to maximize relevance in the searches?

In the title, the body, the conclusion, the summary?

And how many keywords do you incorporate into your article?

Some people use three keywords; others state that they use four or five or six. Some keyword the entire title while others use one keyword in the title.

Where do you place keywords in article and how many do you use?

Thank you.
Janine

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