Project management certifications are often treated as interchangeable, but they're built for different experience levels and different working styles, and picking the wrong one first can mean redoing the work later.
PMP: the gold standard, with a real prerequisite
The Project Management Professional certification is widely recognized and often explicitly requested in job postings, but it requires a documented minimum amount of real project management experience (measured in thousands of hours) before you can even sit the exam. If you don't have that experience yet, PMP isn't your starting point.
CAPM: the entry-level version
The Certified Associate in Project Management is designed specifically for people without the experience PMP requires. It covers the same foundational body of knowledge at a more accessible level, and is a legitimate way to signal project management literacy while you accumulate the experience PMP will eventually require.
Agile/Scrum certifications: a different skill set entirely
PMP and CAPM are built around traditional, plan-driven project management. If you're working in (or targeting) software development or product teams, a Scrum-focused certification (Certified ScrumMaster and similar) is often more directly relevant, since those teams typically run agile sprints rather than traditional project plans.
How to actually choose
Look at job postings in your specific target industry rather than picking based on general reputation — construction, IT, and healthcare project management roles have noticeably different certification expectations, and matching the one your target industry actually asks for matters more than chasing the most prestigious-sounding option.
Courses mentioned in this post
Coursera
Project Management: Applying Predictive and Adaptive Methods
Coursera · MOOC / Non-credit
PMP ® Hazırlık Eğitimi (Türkçe Anlatım) - PMBOK ®- 6 Uyumlu
Udemy · MOOC / Non-credit
Project Management Professional PMP Practice Exams
Udemy · MOOC / Non-credit
Project Management Professional (PMP) Practice Exam
Udemy · Certificate