People who wish to take online training courses register on e-learning sites. At the end of the courses, learners receive certifications and accreditations certifying that they have actually completed their courses to the end. These certifications are obtained after passing exercises and exams. Each platform has its own conditions and procedures for obtaining the said certification or accreditation. For some of them, following the course through to the end allows you to obtain a title registered and validated by the National Directory of Professional Certifications.