Appium implements various locator strategies to find elements in mobile devices, specifically for Android and iOS. The class name strategy uses a string representing a UI element on the current view, while the accessibility id strategy reads a unique identifier for a UI element that remains constant during localization or other changes. The xpath strategy exposes the functionality of XPath language to locate elements within a mobile view, and in mobile environments, ids are not CSS ids but rather native identifiers. Appium also provides methods to use the underlying device automation technology directly, such as Android's UI Automator framework and iOS's UI Automation framework, allowing for fine-grained control over finding elements.