What is what does hmm mean in texting?

"Hmm" is an abbreviation used in texting and online conversations to indicate a moment of thought or reflection. It is often used as a response to a message or question, indicating that the sender is considering their response or is uncertain about something. It can also be used as a filler word when someone is not sure what to say or is hesitant to give a direct answer. The tone and context of the conversation can influence the meaning and implication behind the use of "hmm".