If you’re confused by seeing KEKW or catJAM in chat, these are emotes that come from BTTV. If you want to see them then you can download the browser extension here: https://betterttv.com.
BabyYodaSip
BeanS
catJAM
catJAMJAM
ClapHD
doggoArrive
EvilKermit
keanYOU
KEKW
KEKWcry
HAMDANCE
MYAAA
pressF
pugPls
ThisIsFine