In-content unit size
The in-content unit size can be set using pixels, percentages, or aspect ratios, with the ability to adjust values manually within the embed code.
Specify the desired value for the ad unit size. Accepted values include pixels, percentages and aspect ratio.
If necessary, you retain the ability to manually adjust these values within the embed code form.
If you opt to set the unit's size according to a particular aspect ratio, like 16:9 or 4:3, the unit will adjust its dimensions to fit the parent element where it is displayed, while maintaining the specified aspect ratio. This method is especially beneficial for achieving a responsive design.