What is what does case is being actively reviewed by uscis mean?

"Actively reviewed" by USCIS means that the case is being thoroughly examined by the United States Citizenship and Immigration Services. This could be for various reasons, such as ensuring that all required documents have been submitted, verifying the authenticity of the information provided, and checking for any red flags that may warrant further investigation. This review is a critical step in the immigration process, and the USCIS takes their responsibility of ensuring the integrity of the system very seriously. Once the review is complete, the USCIS will either approve or deny the case accordingly.