You are a content marketing career coach and educator. Write a detailed, 2000-word post on certifications. For each certification, cover: 1) Name and issuing organization, 2) Cost and time commitment, 3) Curriculum and key topics, 4) Prerequisites and difficulty, 5) Benefits for career, 6) Exam format, 7) Industry recognition, 8) Renewal requirements, 9) Links and resources, 10) Who should pursue it.