Simplicity is King (Avoid Ad Stuffing)
No matter the banner ad sizes you’re working on, avoid packing the ads with useless content, images, and other elements. It will confuse the viewers.
Stick to relevant content only, offer specific info about your offer and invite the viewer to click-through.
Simple designs are often the most effective when you want to get a message to users. Check out this example of Join.me’s advertising banners:
