In any page you can insert javascript or html free code (not re-interpreted by EditArea), eg the code for a banner.

Generally banners need a javascript code that has to be inserted into the pages of your site. To do this you have to:

1. select the block in the page you want the banner to be shown
2. go to the "body" entry 
3. click on 
4. enter the code within an eaKeep class div, as shown below:
   

<div class="eaKeep">
    <... banner code...>
</div>