I have a custom banner ad above the header, it looks a little blurry, its dimensions are 728 x 90 px.. The banner is in "postion 1". i have the size size set to 728 x 90 in the banner ad itself

can you point me the right direction to correct this issue? its in "postion 1" . in a custum module.

i need the custom banner above the header to look as sharp as the banner ads in the body, like the GWC ad banner ..SS below, sharp and clear.

if i have no size in the banner ad itself or i set the banner to 728 x 90, it still looks a little blurry, how do i sharpen the image?. https://usedcarnews.com/index.php/en/

SS: https://imgur.com/a/KuyElrG

i have been looking for a solution but havent found one that works yet.

thanks for any suggestions you have..