Below
In short
Below is a preposition used to describe something that is at a lower level or position than something else.
In plain words
It tells you that one thing is underneath or further down than another. You use it to talk about position or rank.
A simple example
The cat is sleeping below the wooden table. You can also say that a junior manager is below a director in a company.
Why it matters
It helps people understand where objects are located in space. It is also useful for describing hierarchies and order in lists.
Easy to mix up
Do not confuse it with 'underneath', which often implies something is directly covered by another object.