Thread: What exactly does the main page "Search" box search through?

What exactly does the main page "Search" box search through?

What exactly does the main page "Search" box search for matches in? For example:

• Ad Titles only
• Ad Descriptions
• Ad Tags
• Ad Reference ID
• Poster data (e.g. username, street, city, ZIP code, ...)

main-search-box.gif
(the screenshot is just to clarify what I mean by "main page 'Search' box.")