How can I get the certificate?

Answer 1

you should mark omar's answer as the most appropriate one
as there is no other way to do it.

Answer 2

Complete the courses or If you have previous knowledge then use Short cut and get the certificates.

Answer 3

[moved due to thread cleanup]

...and if you've already completed a course:
1. Tap your profile picture
2. Tap SKILLS
3. Tap "VIEW CERTIFICATE" under the one you finished
4. SAVE it.

Answer 4

you need to complete the course
if you are new