In Figure 1.3, you can see the default user interface of Blender.

Figure 1.3 - Default user interface

That is the default user interface because it is what you see every time

Blender starts after a fresh install. You can rearrange and modify Editors

from the interface in several ways. What is an Editor? Each division in

the interface is an Editor that has the purpose of handling a particular

type of data.

For instance, you will find the large space at the center with a single

cube, camera, and light as the 3D Viewport. That is the Editor

responsible for displaying 3D data and will also allow you to manipulate

3D models. There you can work with 3D modeling and visualize your

projects in a tridimensional space.

Other essential Editors in Blender:

Properties Editor: Shows options regarding the selected object to

edit and change properties like materials, modifiers, and more.