I've made a metarig (a ready-to-use skeleton) for a character mesh and I've added some extra bones for the feet (my character has long floppy flippers). For each new bone, I need to assign a "Rig type". To do so, in "Pose Mode", I select my new bone and I go to the "Bone Panel" and I scroll down to "Rigify Type" and "Rig type". Here there is a all variety of usable types of rigs...
My question is: With Rigify, what's the difference between the different types of rigs and in which situations should we choose one specific type of rig instead of another ?