Every state in India may have at least one IGNOU regional centre. Some people may have multiples. Kerala, for example, has two.
Regional centres provide admission, textbooks, and results, among other things.
Some courses are available for study in regional centres, but they are uncommon. Study centres are typically used for classes as well as the administration of theory and practical exams.
There are numerous IGNOU study centres located throughout the state and the country. Typically, each district in a state has at least one IGNOU study centre. However, this is conditional on the state. One issue is that not all study centres offer all IGNOU courses.
It is possible that the course you want to study is not available at your nearest study centre. As a result, you must choose a study centre based on your desired course. This is due to the fact that a course that requires practical classes requires a study centre with computer facilities, and so on.
You can attend classes at the study centre, and before the exams, the study centre sends all of your information to the regional centre, such as your attendance, assignment submission, and so on. The regional centre then combines all of this information with your term-end exam results to produce a final result.