Why should we make our explanations clear?and how?

Why should we make it clear?
1.Because other people can understand what we're talking about.
2.It's look nice and neat.
3.Show that you understand it.

How do we make it clear?

1.You can add picture and examples about it.
2.Don't put too much color for the sentences.
3.Organize the space nicely.
4.Make it in your own words.