Surah Az-Zumar is the 39th chapter of the Quran and this surah has 75 verses and this surah is Makki Surah because this surah was revealed in Makkah before Hazrat Prophet Muhammad SAW moved to Medina. The surah talks about the oneness of Allah and teaches that people should worship Allah sincerely. It explains that believers and disbelievers will have different endings. It tells people to worship only Allah and not to worship anyone else with Him. It also reminds us that Allah is the Creator of the heavens and the earth and has full power over everything.
