My website has had some Google AdSense ads for years. These do not bring in much revenue. Google invited me to add AdSense "matched content units".It took some time to work out what these are. What Google does is select pages from your website and then feature photos from them, interspersed with advertisements, in a grid (see the bottom of my home page for example). The advertisements are marked as such, but because they are mixed in with page content, it is hard to tell which is which. The result looks good and it will be interesting to see if it increases revenue, or just annoys my readers.
ps: The matched content can take several minutes to take effect on your web page, when you first set it up. Also I found that if I changed the settings (for example the background color) this took several minutes to take effect.