Please make me understand this paragraph.

Please make me understand this paragraph. Permanent magnetism IS seen on hard magnetic materials, which fall in to the ferromagnetic material family Temporary magnetism is seen in soft magnetic materials, paramagnetic materials and diamagnetic materials.

Ferromagnetism: 

These substances are strongly attracted by a magnetic field . Ferromagnetic substances can be permanently magnetized even in the absence of a magnetic field. Some examples of ferromagnetic substances are iron, cobalt, nickel, gadolinium
These substances moves(strongly) towards the strong field region when kept a non uniform external magnetic field.

Paramagnetism: 

The substances that are attracted by a magnetic field are called paramagnetic substances. These substances get magnetized in a magnetic field in the same direction, but lose magnetism when the magnetic field is removed. Paramagnetic material moves (weakly) towards the weak field region when kept a non uniform external magnetic field.To undergo paramagnet ism, a substance must have one or more unpaired electrons.

Example =O₂

Diamagnetism

This is a form of magnetism that is only exhibited by a substance in the presence of an externally applied magnetic field. It is generally quite a weak effect in most materials, although superconductors exhibit a strong effect. Diamagnetic material moves (very weakly)away from strong field region towards the weak field region. Diamagnetic atoms have only paired electrons.

Example-