Search engines like Google use "crawlers" to find every reachable link on the internet. If a private folder is left open and indexed, these files become searchable via "Google Dorks"—specific search strings used to find exposed data. How Private Photos End Up Publicly Indexed

To create this index, you can use metadata tags to label each JPG image with relevant keywords, such as:

In web architecture, an "Index of" page is an automatically generated list of files on a server where no default HTML index file exists. Functionality

Directory Indexing: What it is and Why You Need to Disable it - Jetpack