A tier 1 sub is the cheapest subscription plan you can buy on Twitch, and oftentimes is the only plan you'll ever need.
Subscribing at tier 1 gives you access to at least a good 95% of the streamer's emotes, as well as other channel perks such as a sub-only discord community.
Anything higher than tier 1 has little to no perks, other than having a more distinguished sub badge.
Insert username here has gifted a tier 1 sub to Joe_Mama!