http://adage.com/article/digital ... advertisers/294510/
刚看到这篇文章,
But the cost per engagement has steadily fallen. It declined by 35% year-on-year during its most recent quarter, although the company reported that the metric netted quarterly growth for the first time, thanks to high demand from advertisers during the World Cup.
TWTR正在我讲的“广告有效性“上狠花力气。。。 |