Surah As-Sajdah (Chapter 32 of the Quran) is primarily focused on removing doubts about the existence of God, the Hereafter, and the prophethood. It encourages reflection on creation, the signs of God in nature, and the resurrection, while also contrasting the fate of believers and disbelievers. The surah also mentions the story of Moses and the Children of Israel as an example of following divine guidance, according to Wikipedia. 

Here’s a more detailed breakdown:

• Removing Doubts:The surah addresses the doubts and arguments of those who deny the principles of Tawhid (belief in one God), the prophethood, and the Hereafter, inviting them to reflect on the signs of God in creation and the signs of resurrection. 
• The Signs of God in Creation:The surah highlights the wonders of the universe and the signs of a wise and powerful creator, urging people to contemplate their own existence and the world around them. 
• Resurrection:The surah emphasizes the reality of the resurrection and the Day of Judgment, where individuals will be judged for their actions. 
• Believers vs. Disbelievers:The surah contrasts the rewards for believers who have faith and do good deeds with the fate of those who disbelieve and act wrongly, highlighting the different destinies in the afterlife. 
• The Example of Moses:The surah mentions the story of Moses and the Children of Israel, who were given divine guidance through Moses, as an example of following God’s commands and receiving divine blessings. 
• Obligatory Prostration:According to Al-Islam.org, Surah As-Sajdah contains an ayat (verse) of prostration (32:15), meaning Muslims are required to perform prostration after reciting this particular verse, according to Quran.com

The Holy Quran – TheQuran.org