Cycle counting is about counting in cycles. You do not count your full inventory at once but do it in parts.
Ad-hoc counting is initiated by the user and is usually not planned, meaning this counting is quite handy in extraordinary situations.
In preparation for tag counting, the store/warehouse employees should place a physical tag on each item. During counting, the worker must fill in the item ID, counted quantity, and other relevant information on the designated spaces on the tag.