Removal is not the same as extraction
Delete PDF Pages is best when the document should mostly stay intact but has blanks, duplicates, outdated terms, accidental scans, or an unwanted attachment. The keep/remove view is safer than typing a range because you see exactly what will disappear and how the remaining pages close their numbering gap.
Do a fast visual scan before marking anything. A page that looks blank may have a signature on the reverse, a faint stamp, or a continuation of a table. The quick Odd, Even, First, and Last controls are useful for common clean-up tasks, but the red preview state gives you a chance to catch an over-broad selection.

