Organize PDF reorders and rotates pages, then saves a new file. Use it when a scan came in upside down or a page landed in the wrong place.
Rotation is saved into the downloaded PDF. The file you dropped is not edited in place.
Questions
Can I delete a page?
Remove the pages you do not want from the list, then download. The original file stays as it was.
Will rotation stick in other PDF readers?
Yes. The rotation is written into the PDF you download.