Please explain me clearly the concept of Earth's Magnetism including Horizontal Component of the field, Angle of Dip and Angle of declination/inclination. Please use some examples and figures if possible. I have read NCERT and HCV but couldn't undestand it. Its also not given in University Physics.The article in wikipidea is also not helpful. so please help.

In this chapter, we will discuss all magnets, particularly bar magnets. We will look at their properties and other related terms. Let us start with the types of magnets.Let us look at the types of magnets in brief:

Natural Magnets: They occur in nature and have a weakmagnetic field. Examples include lodestones.
Artificial magnets: They are produced by man-made means and have a stronger magnetic field. You can shape them as required. When shaped in form of a bar, they are called bar magnets.

[bar magnet]

Bar Magnet

A bar magnet is a rectangular piece of the object. It is made up of iron, steel or any other ferromagnetic substance or ferromagnetic composite, having permanentmagnetic properties. The magnet has two poles: a north and a south pole. When you suspend it freely, the magnet aligns itself so that the north pole points towards the magnetic north pole of theearth.