可选中1个或多个下面的关键词，搜索相关资料。也可直接点“搜索资料”搜索整个问题。

　　# of impressions # of contacts made # of new clients recruited through each channel Cost for each new client acquisition (including value of your time) Retention rates

　　汇总下，推特营销对于工业产品来说意义不大，主要的海外SNS平台还是谷歌三剑客。