Use words people already type
Good captions include wow, nope, yes, please, thanks, sorry, wait, really, oops, good job, slay, and LMAO. Familiar phrases make stickers easier to use.
Keep the caption short
Long text becomes unreadable in chat. One to three words is usually enough if the face and pose carry the emotion.
Match caption tone to the character
A cute pet pack, office reaction pack, meme pack, and fan-style pack should not all use the same voice. The caption tone should fit the pack identity.
