前幾天的 Hacker News Daily 上看到「Why do people not notice our enormous, prominent, clear and contrasting purple banner?」這篇 2018 年的討論，裡面在講為什麼使用者會常態性忽略 banner 的內容。
在答覆區裡面有人提到了維基百科上面的 Banner blindness 這個條目，題到了網站的使用者會刻意或是非刻意的忽略掉像 banner 的資訊：
Banner blindness is a phenomenon in web usability where visitors to a website consciously or unconsciously ignore banner-like information. A broader term covering all forms of advertising is ad blindness, and the mass of banners that people ignore is called banner noise.
開頭也提到了 banner 廣告 CTR 的變化：
The first banner ad appeared in 1994. The average click-through rate (CTR) dropped from 2% in 1995 to 0.5% in 1998. After a relatively stable period with a 0.6% click-through rate in 2003, CTR rebounded to 1% by 2013.
所以這個現象有個專有名詞來形容...