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Answer Posted / Kamaljeet Kaur
Action and Filter are two fundamental concepts in WordPress that allow developers to extend or alter the functionality of a plugin or theme without modifying its core code. An Action, denoted by the 'do_action' function, triggers a specific event at a certain point during execution process. Filters, denoted by the 'apply_filters' function, enable the manipulation of data before it is used in a particular context. For example, using filters, developers can change the content of a post or modify how an image is displayed.
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