"Granular control" refers to the ability to have precise and detailed control over something. It means having the power to make specific and fine adjustments or changes to different aspects or elements. Full definition
There is a Professional Mode available though, that allows for more granular control over aspects like ISO and shutter speed. (androidauthority.com)
Facebook also offered more granular control over what information its users shared with developers, and a new login screen with an added «Edit the info you provide» link. (buzzfeed.com)
Helped implement new use of Citrix policies allowing for more granular control of the way users are provisioned with different types of access / resources not previously possible in the Citrix 3.0 environment. (jobhero.com)