The Limited Access permission level is unusual. It enables a user or group to browse to a site page or library in order to access a specific content item. Typically, the user has been given access to a single item in a list or library, but does not have permission to open or edit any other items in the library. The limited Access permission level includes all the permissions that the user requires to access the required item.
You cannot assign Limited Access permission level directly to a user or group. Instead, you assign appropriate permission to the single item, and then SharePoint automatically assigns Limited Access to other required locations.