Land Use Maps are the less-detailed counterpart to Area Maps. (Though Area Maps also show land use, they are not the same thing.) They are typically required in the context of less significant land use approvals, such as Certifications and Authorizations (whereas Special Permits and Rezonings get Area Maps). As of this writing, the DCP website still suggests that you can use a screenshot of the ZoLa website for your Land Use Map. But the Department's standards go on to request that the maps include all sorts of details that are not shown in ZoLa, and would thus need to be added. Or you can have us prepare the map and not have to worry about any of that.
Area Maps are an all-purpose land use map that is required with most applications that are bound for review by the City Planning Commission. (However, don't confuse them with “Land Use Maps.”) They show all manner of things that are relevant to land use review: land uses (obviously), building footprints, zoning districts, building heights, transit lines, street widths, traffic directions, block numbers, and more. And, when prepared for a Zoning Map Amendment or City Map Amendment application, they also illustrate the proposed change.