DVB stands for Digital Video Broadcasting, which is the way that television programs are broadcasted and received by TVs. Think of it like a secret code or language that your TV and the broadcast station use to talk to each other to transfer the TV program.
Before DVB, TVs would receive analog signals which was like listening to a radio that was all fuzzy. DVB makes it possible for TVs to receive digital signals which are like listening to a CD where you can hear everything clearly.
There are different types of DVB like DVB-T, DVB-S, and DVB-C which are used for different ways of distribution. DVB-T is for the traditional way of broadcasting through antennas on the roof and DVB-S is for satellite distribution.
Overall, DVB is like a super cool way for TVs and broadcast stations to communicate with each other, making it possible for us to watch TV shows in a high-quality and clear way, just like watching a movie!