The regular DOM is something that is generated by HTML. In React, It has the concept of Virtual DOM which is just a representation of DOM object.

The Virtual DOM has same properties as Real DOM with just the difference that it cannot update anything on-screen.

The changes in Virtual DOM are updated faster that actual DOM as it don’t make changes on-screen. The Virtual DOM can be referred to as the blueprint of any model and Regular DOM actual House.so making changes in actual home and making changes in blueprint can be assumed