CHIRP is software used by terrans for the purpose of sending quick messages between themselves. Such messages can be sent between datapads.
The show Hypernet Helpline broadcast tips and tricks to minimize the holovid spam on a user's CHIRP profile.
CHIRP appears analogous to the real-world Twitter social network. In the Project Blackstone transmedia campaign, "chirps" between staff members were represented by actual tweets on Twitter.