Reminder -- in the cerebellum, all of the neurons except for granule cells (that means stellate, basket, Golgi, Purkinje, and Lugaro cells (not shown above)) are considered inhibitory - meaning, they contain inhibitory synapses at the end of their axons, and they use inhibitory neurotransmitters such as GABA (Purkinje cells).
Granule cells are therefore considered excitatory and use excitatory