This isn’t really the place for this question but I’ll tell ya about it. So there are two ways to support streamers on the site, one way is subscribing to them. Subscribing to someone means you pay $5 a month to that user, and in return you get a cool logo next to your name in chat, and you can use their special chat emoticons across all twitch chats. You will see this subscribe button right next to the follow button, not all streamers have a subscribe button because you must be partnered with twitch to get it. Next in donating to the streamer, not all streamers take donations but you can find out if they do by scrolling down to their panels (located under their stream). If you see something that say’s donate, just click on that and it will redirect you to the donation system they have, the most common way is through PayPal (you will need a paypal account to donate if so). Some people may have other options but PayPal is the best route.