An Advanced Find is used to query the database to retrieve information. It can be a simple search or a more complex search with more narrow results. Advanced Finds can use one or many tables for search criteria.
An example of a simple search: Contacts with email addresses that contain .edu
The Look For field shows the field the system will use to start the search. Different field allow you to search different criteria, so if you aren't finding the option you need you can try changing this field for other options.
If you need more data to appear in your search results you can select Edit Columns and a popup screen will appear.
Select Add Columns and another pop up will appear that allows you to select fields to pull from for your search results.
You can change which fields are available in the column selections by changing the Record Type to a different entity to get more fields.