Use a Special Ability
There are three types of special abilities: extraordinary, spell-like, and supernatural. Special abilities often carry the parenthetical abbreviations (Ex), (Sp), or (Su) to indicate whether they are extraordinary, spell-like, or supernatural abilities. Some are ongoing, while others are use-activated. For more details, including descriptions of specific special abilities, see page 262.
Using a special ability is usually a standard action, unless it is an ongoing ability or the ability says otherwise. In rare cases, an ability might take a full action or a move action to activate. In most cases, a use-activated special ability cannot be activated as a swift action. Using a spell-like ability typically provokes attacks of opportunity (see page 248) unless stated otherwise.
Source
Core Rulebook pg. 247