itscarmine wrote:
For example, I put the word "what" in my finder window's spotlight and read-me files from fonts I've downloaded and just a bunch of other random files pop up.
They aren't random files. A Spotlight search on "what" is very broad & will return document files, emails, Address Book contacts, calendar events, web pages, & many other items that contain the word "what" in them, plus items that have the word "what" in the
metadata for them. (Metadata is data about data, like descriptions, comments, & many other attributes.)
You can control the categories of items Spotlight searches for in System Preferences > Spotlight > Search Results tab. You can narrow down Spotlight Finder searches by clicking the plus button at the right of the window & adding various search attributes. If you select "other" from the drop down list of attributes, you will see that there are a huge number of metadata attributes that Spotlight indexes.
Similarly, the items you see in the "Search for" section in the Finder sidebar are not actually folders but *saved searches*, including various search criteria. For example, the "All Documents" one simply searches for all files with a "Kind" attribute of "document," which includes essentially every application document. You can also create your own searches & add them to the saved searches: just use the plus button to add as many criteria as you wish & then click the "Save" button on the right of the window.
Although search results all appear to be in the same place because they are in the same Finder window, it is important to remember that they are actually in many different folders. Thus, you do not want to just delete them all, nor are they duplicates of what you see in regular folder views. If you delete an item in a search result window, you will be deleting the item from its actual location, wherever that might be.