包括四个不同的因素：广告、公共关系、口碑和销售点。

Promotion has four distinct elements - advertising, public relations, word of mouth and point of sale.

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奥美公共关系国际集团老板克里斯托弗·格拉夫说：“当你比较广告和公关时，这种对比并非泾渭分明。”

"When you look at advertising versus public relations, it's not going to be those clearly defined silos," says Christopher Graves, the boss of Ogilvy public relations Worldwide.

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insight应用将订阅源分为四大类：社会化媒体、公共关系、营销和品牌，以及广告。

The M.insight application sorts the feeds into four main categories: social media, public relations, marketing and branding, and advertising.

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