You will find options to add different types of objects in that menu,

starting with polygons under the Mesh group and others like cameras,

lights, and even Collection instances. Depending on the project in

Blender, you might need a particular type of object. To get started with

3D modeling, the most straightforward type to create and manage is a

Mesh object (Polygon).

At the Mesh group, you can create geometrical primitives such as:

Plane

Cube

Circle

UV Sphere (square faces)

ICO Sphere (triangular facer)

Cylinder

Cone

Torus

We can use those primitives as a starting point for several modeling

projects. A Cube can become a chair or a human-head depending on the

number of modifications applied to the object.

To create a model at the 3D Viewport, you must pick a location to create

the object by placing the 3D Cursor and pressing the SHIFT+A keys or

using the Add menu. For instance, we can add a new Cylinder to the

scene (Figure 2.2).