What does this ip mean?

Question

Computer networks

Hello, I saw the following lines in several c ++ projects on the SFML library

UdpSocket socket;
socket.receive(packet, sender, port); // Где sender = 0.0.0.0

and there sender is equal to 0.0.0.0, and the question is:
what does this ip address 0.0.0.0 mean, does this mean that it accepts from all ip addresses that are connected to it?