This is the 8829th most frequent Japanese word.
栞
Bookmark.
In this sentence, "栞" (shiori) is used in its common meaning to denote a bookmark that is placed in a book to keep track of where you stopped reading.
本を読んだら、栞を挟んで続きは後で読もう。
After reading the book, I'll place a bookmark and continue reading later.
Here "栞" refers to a brochure-like guide created for assisting during a trip, showcasing an extended meaning depending on the context.
旅行の前に地図を見ながら栞を作ろうとしている。
Before the trip, I am planning to make a guide using a map.
In this sentence, "栞" is again used to mean bookmark, emphasizing a personal and aesthetic aspect.