English Skills 001 is not a specific course for credit. It is actually a way for students to do individualized learning in the areas they need most. Your instructor will let you know what sections you should complete. This will help you to achieve your goals. Sometimes students need to review certain topics before starting a formal course. Sometimes students need to take a break from a course to review specific topics before moving forward in their courses.
Regardless of why you are doing English Skills 001, it will be an important step for student success in moving towards your goals.