I find all ads — both search ads and website ads — very helpful in training the brain to ignore the noise. Isn't it amazing how we trained ourselves to immediately detect the 1pt hidden "Sponsored" mark and scroll the page down to the first real search result, or immediately locate the Close or X button on the pop-up ad making sure none of the actual ad content gets through our well-trained firewall in our brain. Amazing. Browsing the web is such a fun and dynamic experience these days!