You can take Google Cloud certification courses on Coursera free for a month (until November 6, 2021). Note that you will still need to pay for the certification exam. But you can get a 20% discount voucher from Google. Discount voucher must be redeemed by Dec 31, 2021 but exams can be scheduled out as far as March 31, 2021.
There is no limit on the number of courses you can enroll in. This promotion is limited to the first 100,000 redemptions. After the first free month, you can continue the course at $49/month. Note that you will have to provide your credit card information to sign up. If you are only interested in the free month, remember to cancel before your credit card is charged.
Even if you are not interested in getting a Google Cloud certification, this is a great opportunity to get access to high quality courses on Google Cloud. If you are taking a standalone course, you will have access to the course for 180 days.
While Google Cloud owns a smaller piece of the market compared to Azure and AWS, it is still a formidable player in the cloud. According to this survey, Google Certified Professional Data Engineer fetches the highest paying IT job in the cloud space.