According to the an organization can increase brand awareness or even generate sales by web-based word-of-mouth marketing or promoting a product or service to other people.

The answer is:  " online direct marketing model " .

    " According to the  online direct marketing model , an organization can [increase brand awareness} or even {generate sales] by 'web-based word-of-mouth marketing' or 'promoting a product or service to other people' . "

{Note that:  "web-based word-of-mouth marketing" is also known as:  

            "[web-based] buzz marketing .} " .

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