I explain the Align Components tool which allows for fast alignment of objects (at the object level) or components (at the geometry level).
YouTube Playlist
Here is a link to our YouTube playlist ‘Houdini Tutorials for Absolute Beginners’:
The Houdini Armoury - A Course for Beginners
If you need a structured, detailed course covering the fundamentals of Houdini, check out the Houdini Armoury (in Early Access at time of writing).