Sending it on other servers or in DMs needs Discord Nitro.
To add it to a server you manage, download it, then open Server Settings → Stickers → Upload Sticker. Discord takes PNG, APNG and GIF files up to 512 KB.
More stickers from Friends | Friendly ⋅ Guild ⋅ 24/7 Active ⋅ Make Friends ⋅ Anime ⋅ non dating ⋅ asktodm ⋅ sfw