Final answer:
When you click and drag on the widget handle in the 3D viewport, you can move and manipulate objects in a 3D space following specific axes.
Step-by-step explanation:
When you click and drag on the widget handle on the 3D viewport, you can manipulate and move objects in a 3D space. The widget handle usually consists of three axes represented by arrows, each corresponding to a specific direction: X, Y, and Z. Clicking and dragging on the X arrow will move the object along the X-axis, the Y arrow will move it along the Y-axis, and the Z arrow will move it along the Z-axis.
For example, if you click and drag on the Y arrow of the widget handle, you can lift an object higher or lower in the 3D space. If you, instead, click and drag on the X arrow, you can move the object to the left or right. This allows you to freely position and manipulate objects in a 3D environment.