Where should I look?

I am fairly new to ZC, where should I look to edit images and hyperlinks for my banners?

onlinecornerstore.co
Sony ad and free shipping banners
Thank you.

Unfortunately, you may need to first find a new template. The one you have is seven years old. Ancient in e-commerce years. Also, your Sony link is for localhost. I'd get the foundation solid before starting on the second floor.

Search banners Zen Cart for several articles and items about banners.