SEOPTI makes an important point about general advice not being applicable to specific web pages
I received a reminder from AdSense during the week. Apparently I had ignored a similar email a month earlier. As I did with this one.
It was the usual "put more adblocks" on your XXX number of pages, and yet this time included a .png file of one of my pages, depicting a hot spot where a 728X90 should be placed.
Right adjacent to an existing 728X90 ad block?
AdSense never get the hang of the fact many of us have sites to serve our users needs and use AdSense as supplementary income. As opposed to people who have sites to generate AdSense income where, content comes second. I have a 728X90 centred above the fold, before content and another 728X15 at the bottom of the content.
And Google itself bang on about user experience? Want bad user experience? Go to recipe sites or, driver download sites and GNU software sites where sometimes it is almost impossible to distinguish between what you're really after and thinly disguised "download me" ads.