How to use Lottery

Hello, I would like to know how do I use the lottery system among the followers. I’ve seen it being used in some streams and would like to use this tool to leverage my stream!

I think what you are referring to is the Twitch Giveaway Chrome Add-in.

https://chrome.google.com/webstore/detail/twitch-giveaways/poohjpljfecljomfhhimjhddddlidhdd?utm_campaign=en&utm_source=en-ha-na-us-bk-webstr&utm_medium=ha