When searching the public site, not all content will show up using the built in search. How can I know what content will and what will not?
The only content that is searchable from the public Search widget is content that is located on a page that is included in a published menu. This excludes all types of detail pages and landing pages.
If you would like to make sure a specific item shows up in a search, you can do so by creating a Featured Link to give results based on keywords typed in. You can learn more about featured links in this help topic on Featured Links.