The IDK full form is known to be I don't know or we can say that I do not know about a particular thing. Whole of these particular abbreviations as well as acronyms are being used by the people all across the globe over the social media platforms in order to make the communication and conversation easier and smooth also.

Plus, in addition to it, we can also say that the person uses it in order to make the communication easier and also efficient enough to talk to another person on the other end.