granularity
noun [ U ]
uk/ˌɡrænjʊˈlærəti/ us/ˌɡrænjəˈlærəti/a lot of small details included in information, making it possible for you to understand very clearly what is happening:
degree/level of granularity In our market analysis we offer a whole new level of granularity.
We need greater granularity in a number of key areas of the data.