Can you explain what a render tree structure is during page rendering?

In Flutter, the render tree is a structure that describes how exactly the interface elements will be displayed on the screen. It is created after widgets are built and transformed into render objects (RenderObjects). The render tree is responsible for positioning, sizing, and drawing elements, ensuring efficient UI updates when changes occur.

The process is roughly as follows:

• Widgets describe the UI configuration.
• Elements link widgets with render objects.
• The render tree contains objects that directly draw and manage layout.

This allows Flutter to optimize redrawing and update only the parts of the interface that have changed.