Here's why:

* Low altitude: Stratus clouds are low-level clouds, typically found below 2,000 feet.

* Gray and shapeless: They are known for their uniform, gray appearance and lack of distinct features. They often resemble a "blanket" covering the sky.

* Can bring drizzle: Stratus clouds are associated with light rain or drizzle.

Let me know if you have any other cloud descriptions, and I'll do my best to help you identify them!