Twitch offers Bits which is a type of donation to Twitch Affiliates or Partners. If you are not an Affiliate or a Partner, you can make a direct request for donations on your page. You will need to create a link with the help of Stripe, PayPal or another online payment processing system. You can then make donation requests in your stream and share the payment details. To encourage your fans, you can set up a donations goal and show your progress towards that goal.