This is the 8680th most frequent Japanese word.
日持ち
Shelf life or duration of freshness.
日持ち here is used to specify the duration for which new foods can remain consumable.
新鮮な食品は日持ちが短いことが多いですね。
Fresh foods often have a short shelf life, don't they?
日持ち is utilized to express the prolongation of the freshness or edibility of an item when certain conditions are applied.
冷蔵庫に入れておけば日持ちが少し伸びますよ。
If you put it in the fridge, its shelf life will extend a bit.
日持ち in this sentence refers to the ability of the snack to remain edible and fresh over time.