WhatsApp has a kind of sticker store where it offers stickers created by the company itself. Some are universal and others are only distributed in certain countries and without appearing available in the rest. But there is a way to install the limited ones: just access its direct download link.
First there were emoticons, that set of characters that has been transmitting emotions since the first typewritten texts. Emojis added much sharper color, variety, and gestures. The stickers or stickers arrived for lighten the weight of images and gifs bringing complete collections of emotions. And the catalog of them that WhatsApp has is much broader than it seems since there are stickers that are only distributed in certain countries.