2011 年 10月 21 日随笔档案 - Android Development

2011年10月21日

摘要： CTR | Click-through Rate =>The CTR for an ad is defined as the number of clicks on an ad divided by the number of times the ad is shown (impressions), expressed as a percentage.The average click-through rate of 3% in the 1990s declined to 0.28% by 2003.QR code | Quick Response code =>Created b 阅读全文

posted @ 2011-10-21 22:04 Android Development 阅读(262) 评论(0) 推荐(0)