Whats a custom object?
It’s just a fancy name for a data container in the system, and can be used to represent anything that you like. You might define a custom object for a well, or a field, or a safety log, or whatever you want. If it helps, think of it as a row in a table in a database where you define the columns on the fly. If that doesn’t help, then forget I just said that. Once you have custom objects you can specify which of them get loaded into a particular spreadsheet, based on criteria you supply, and you can define custom objects to be saved by a spreadsheet. It’s very quick and intuitive, and custom objects give you great flexibility in building systems.