说起来，好像谷歌也有类似的推广服务。比如，如果你在邮件里提到了汽车这样的关键词，在页面的广告栏里就会出现相应的广告。百度还有竞价排名。
shuō qǐlai ，hǎoxiàng Gǔgē yě yǒu lèisì de tuīguǎng fúwù 。bǐrú ，rúguǒ nǐ zài yóujiàn lǐ tídào le qìchē zhèyàng de guānjiàncí ，zài yèmiàn de guǎnggàolán lǐ jiù huì chūxiàn xiāngyìng de guǎnggào 。Bǎidù háiyǒu jìngjià páimíng 。
It sounds like the kind of promotional service that Google offers. For example, when you're on email and you bring up car related keywords, the ad board on the page will display ads relevant to them. Baidu also offers paid rankings.