input: [Ad size] 970x250 [Text ads] ✓ [Display ads] ✓ [Description] 
output: Also known as a "billboard." A brand-centric format that performs well when placed in a premium position on the page, e.g., above the main content of the page. While demand from advertisers for larger ad formats is on the rise, the supply of available display ads for this ad size is currently limited.