I observe in many SOPs I've reviewed that many find it difficult to answer the question
"Why are you interested in our school"
Many write in a general form
"... because your school have the top professors, facilities, etc."
That answer is not specific enough. Anyone can write

that about any school
You want to write things specific about the school or department that got you interested
It may be research facilities/set up/methodologies unique to that department
It may also be the research works of a professor of interest or the research grants/funds

allocated to your laboratory of interest
You may talk about the quality of professors especially if they have a Nobel Laureate
Another interesting factor can be the research output of the department. How much of their works are visible through publications
Search their website

I'm pretty sure you will find this information
Check professors' profiles, etc. You'll find what you're looking for