Half ticks (C-Tick & P-Tick)
Consumer and Producer ticks
In Bedrock edition each Redstone tick contains two Game ticks. However, unlike Java edition, the tick in the first and second half of the tick behave differently and serve different functions. The first half-tick in the Redstone tick is the Consumer tick (C-tick) and the second half is the Producer tick (P-tick). Outside of redstone components both of these functions serve the same purpose and have no difference.
C-tick and consumers
C-ticks are the tick in the first half of the redstone tick. C ticks affect only consumers (A list of all consumers is below).
Consumers are defined by any redstone-related block that can interact with redstone, but has no method of outputting a redstone signal.