MOOCs (Massive Open Online Courses), play a crucial role in advancing the development of global e-education. This form of education, delivered via the internet, aims to reach diverse learners worldwide, regardless of their reasons for learning, backgrounds, abilities, or limitations. However, currently, the accessibility of MOOC platforms and content still remains a challenge, as they are not adequately available to all students. to effectively understand the MOOC phenomenon, it is important to uncover and visualize the MOOC research trends and patterns. This paper presents a complete overview of MOOC research from 2008 to 2022, including several studies led in different years. The study also offers an all-about investigation of the MOOC system, its functions, and its components.