
0.8%
On the page NN/g analyzed, one of 132 fixations landed in the ad-bearing right rail: 0.8% of attention across 25% of the content area—33 times smaller than the space warranted.
Nielsen Norman Group, "Banner Blindness Revisited" (Kara Pernice), 2018 (opens in a new tab)One analyzed page's right rail; 1997–2018 eyetracking findings

