How to Get Stickers in Pokémon GO
By Andrew Lin

How to Get Stickers in Pokémon GO will be important to know once you've run out of the ones they give you. Here's how to get your hands on more stickers to participate in the new personalization feature.
How to Get Stickers in Pokémon GO
You'll have a chance to get stickers when you open gifts your friends send you, just as you could receive Poké Balls or Stardust. Stickers don't have any in-game bonuses associated with them, so you won't need to horde them. If you receive stickers in a gift, keep the love going by sending them to your friends, too.
Make your friends smile today—Gift stickers are now live in Pokémon GO! https://t.co/aNIsKwFMV6 pic.twitter.com/iJjprIUeZD
— Pokémon GO (@PokemonGoApp) June 11, 2020
To attach a sticker to a gift, just hit "Add Sticker" before you send the gift out. Each sticker in your inventory can be used only once. There are five sticker designs to start with.
It doesn't seem that gifts with stickers attached increase your chances of finding stickers inside of them.
There will also be premium sticker bundles available in the shop in the future. There are no stickers available in the shop at the time of writing.
Stickers don't serve any function other than to be attach to a gift, but they sure are cute, aren't they?