The green horizontal line that is located on the right side of the lesson if you are using your computer, or under the lesson if you are using your phone, is indicating your progress.
How To Save Your Progress
This green line can indicate your progress only if you click on the button “Mark Complete” under the lesson you finished, or “Click here to continue” after the quiz.
Make sure to click these buttons if you want to save your progress.
Or on the quiz
Resume Your Learning
The lessons that you completed have green dots next to their titles. You can easily resume your learning any time you log in to your account. To do so, click on the next lesson with a gray dot next to its name. Lessons with gray dots are the lessons that you didn’t watch yet.
How to See More Details
To see more details about your progress with quizzes and practice tests, go to the page “My dashboard”.
Click on the small arrow next to the name of the course. You can now see all details about your quizzes, including your score and statistics.
Check Your Statistics
Summarizing, to track your progress, you need to click the “Mark completed” or “Click here to continue” button under every lesson you learned.