What does Maxwell's electromagnetic equation describe?

 What does Maxwell's electromagnetic equation describe?

> Maxwell's four electromagnetic equation gave an brief concept about current and electromagnetism .

Here are the four electromagnetic equations which was given by the Maxwell's 

 From this Maxwell's  electromagnetic equations we know that 

> Electric field and magnetic field are generated from  charges or current .

  

> Magnetic field is generated from changing electric field vis-a-vis 

Or 

Electric field is generated from changing magnetic field 

> He  gave & prove charge countinutey equation ( displacement current)