Even with a tool such as the 3D Cursor that helps with alignment, you still can get another great option to place objects using reference points such as vertices, edges, and faces.
In the Blender user interface, you will find a small magnet icon at the bottom of your 3D View window, which will activate the snap during a transformation action. Once you enable the tool, all transformations will start to look for reference points.
For instance, when you move objects, Blender will start to look for vertices that are close to each other. Once it finds a vertex that matches your criteria, Blender will place them together.
Where is this tool? You will find it at the bottom of the 3D View window as a small magnet icon, ...
