Filler words are sounds, words, or phrases used in speech or writing that do not add meaningful content but serve to fill pauses, signal hesitation, or give the speaker time to think. They often appear unintentionally and can reflect uncertainty or hesitation. Common examples include "um," "uh," "like," "you know," and "so." These words are used to avoid silence in conversation and to show the speaker is preparing their next words or inviting a response, though overuse can weaken communication clarity and confidence.
Filler words vary by language and culture but serve similar conversational purposes worldwide, acting as verbal pauses or discourse markers.