The Adopt-a-Page information is at https://wiki.familysearch.org/en/Adopt and looks like this:
The site answers the question "What is page adoption" with:
"Societies, archives or other family history organizations who wish to adopt a page will have their society logo and links to their society web page prominently featured on the page they adopt. You can see an example of what an adopted page might look like here. "
The sample adopted page is shown below: