Deleting pages from a PDF is useful for sharing a subset, but printed page numbers may not match viewer page positions. Identify the pages in the thumbnail grid and keep a copy of the original before removing anything.
After export, count the remaining pages and inspect the first page after every removed range. Check bookmarks, links, and table-of-contents references; deleting a page can leave them pointing to the wrong place. For confidential material, removing visible pages may not remove metadata or attachments, so review the whole output before sharing.