Variants/Varieties differ in rarity and you'll find the Odds listed in the info tab of each Chapter. A Chapter may contain 3-5 Variants. Every Chapter in a single Sticker Book will have the same Variants and Variant Odds. You can complete a Chapter by collecting one of any of the Stickers in any Variant. You can also challenge yourself to collect all of the Stickers in each Variant. It's your collection!
Tap on the Chapter to view and purchase the stickers it contains.