1) The document analyzes how ad visibility, attention, and memory differ across editorial, social media, and search environments on mobile devices.
2) It finds that ads receive the highest visibility and longest viewing times in the editorial environment, with ads visible for an average of 44 seconds, compared to just 3 seconds in social media and 6 seconds in search.
3) However, ads are more likely to be actually viewed by users in social media (99% view rate) and search (93% view rate) compared to editorial (72% view rate), likely due to how content and ads are presented.