In one sentence, describe what the following article is about:

Go to https://www.youtube.com/premium in your computer's web browser. A YouTube Premium subscription removes all ads from any videos you watch while signed into your Google Account on all your devices (e.g., Windows, Mac, iPhone, Android, Xbox, etc.). It's a blue button in the middle of the page. If you're signed into your Google Account and you've already used a free month of YouTube Premium or YouTube Red in the past, this button will say GET YOUTUBE PREMIUM instead. If you aren't logged into your Google Account, enter your email address and password when prompted, then click TRY IT FREE again before proceeding. Type your card number, card expiration date, and card security code into the labeled text fields, then enter your billing address as it appears on your bank statements in the "Billing address" text box. If you want to use a non-card payment method, click Add credit or debit card at the top of the window, then click Add new PayPal account and follow the on-screen prompts. If you already have a card on file with Google, you'll just enter the card's security code. It's at the bottom of the window. Doing so signs you up for YouTube Premium; you'll receive one month free, after which point you'll be billed $11.99 per month. If you clicked GET YOUTUBE PREMIUM instead of TRY IT FREE, you will be billed upon clicking BUY.
Open the YouTube Premium sign-up page. Click TRY IT FREE. Enter your payment details. Click BUY.