My website does around 800k pageviews a month. I've been using div box codes that show and hide depending on screen size to show a banner or square for mobile. If you test it out on my site you will see it changes as you drag the window smaller. Is that bad for adsense? Will I be penalized if the AD is loaded but not seen on the screen? Also could you please tell me how the placements of my ads are. Thank you codplayercards.com