This can be your logo, a heading graphic, a gripping photograph. This should be at the top left or center of your site page. Say you have an online nursery business. You might splash a stunning photo of billowing red begonias across the top of your page. Right under it you could have your logo and business name.
Nothing spoils a photo more than faint unrecognizable smears on it.
Don't put paragraphs of text. They won't bother with it, and may even leave your site. A web page is like a poster. Present information briefly and design it so the whole poster can be read quickly. This means planning graphics, tables, or short text snips to be placed on the page in such a pattern as to lead your viewers along the page to see what you want them to see without their making a conscious effort.