%s may refer to:
C string
edit%s, in printf format string%s, in scanf format string
System time
edit%s, seconds in the strftime format string%s, used to check the Unix timestamp
Web browsers and websites
edit- %s as a smart bookmark marker showing where to insert an argument string
- %s in a quick searchbox is used for customisation for web browsers such as Opera, Chromium and Firefox, After the URL of the (empty) target site searchbox add %s so that the term in the browser searchbox is transferred into the site searchbox