The course which is a specialization in SEO is completely outdated. They are using content from 2013, most of the tools displayed for measuring different aspects of technical SEO have changed or don't exist. Coursera is charging a monthly subscription way higher than any other online learning platform.
There are few students to grade assignments, so grades take longer than expected to get back. Most of the times the feedback given by other students is absolutely terrible, and irrelevant to instructions. Seems like they didn't take the same course you did.
Support is also bad, they have one standard way of doing things and are incapable of helping you in a particular case.
At the end I did receive a course certification, which I am ashamed to even add to Linkedin, because although it may say "completed SEO specialization" it really means "wasted his/her time".
I highly recommend to do better research on online courses and stay away from Coursera. Review collected by and hosted on G2.com.