# What are Assemblies?

An Assembly is the execution of file conversion instructions (called Assembly Instructions) on uploaded and/or imported files. Each Assembly has a unique `assembly_id`identifier that can be used to refer to the Assembly in subsequent API requests.

Assembly Instructions consist of multiple Steps that each instruct our Robotshow to handle files given to them. As such, multiple Jobs can be spawned as part of a single Assembly. Information on the status and results of these Jobs can be found in theAssembly Status JSON.