Know purpose of each object, and list types of input and output for each inlet/outlet:

tapin~ : delay processor input
      input: signal
      output always goes to tapout~
tapout~: delay processor output
      input: always connected to tapin, accepts floating point to set delay time
      argument: delay time default
      output: delayed signal
pluggo parameter (pp): define plug-in fader parameters
      arguments in following order: fader number, name, minimum value, maximum value, increment label
      Get Info allows hints about the fader purpose to be provided to the user.
plugin~
      starts plug-in processing, point where plug-in receives data from host application (sequencer)
plugout~
      ends plug-in processing, point where plug-in transmits data to host application after processing.