For each site you can add an unlimited number of ad units! The appearance of the unit can be configured as you please! Almost everything is configured. The number of ads in the block, the size of the ad unit, the color of the background of the block, the color of the stroke of the block, the size of the image (the image can be completely disabled).
You can adjust the size, color, font style. Customize titles, descriptions, links.
You can configure the unit to harmonize with the design of your site. You can make blocks similar to adsense blocks.
After configuring the block, you just need to copy the block code to your site, to the place where you want to show this block.
If you do not understand something, I will gladly help you.