The Rebbe clarifies that the Megillah is more than just a book; it is a letter of salvation. By folding it, doubling doubtful words, and reciting the after-blessing even in private, we ensure our reading is meticulous. These customs, rooted in the Rebbe’s personal observations of the Previous Rebbe, maintain the integrity of our ancient tradition.
https://www.torahrecordings.com/shulchan_menachem/orach_chayim/347_001