Why astable multivibrator is free running oscillator?

An astable multivibrator is considered a free-running oscillator because it continuously alternates between its two unstable states without requiring any external triggering. It uses positive feedback and the charging/discharging of capacitors to create a repetitive oscillation, generating a square wave output. The circuit's inherent design allows it to self-sustain these oscillations, making it ideal for applications like clock pulses and timing circuits.