Sometimes while doing a bunch of manual drag-n-drop of files and folders in a Finder.app window, I'll end up with a visual mess. Compared to other folders, nothing is organized on the grid.
I can tell Finder.app to clean that up with the Clean Up menu option.
While focused on the folder that I'm concerned about, I can go to View > Clean Up in the top menu. Everything will snap into place.
On the specific Finder.app window, there is also a triple-dot actions menu that appears on the top right. The Clean Up action is available there as well.
There is also a Clean Up By option which is a nice way to organize by some attribute, such as the type (e.g Folder/File and extension).