Closed-loop (closed-loop structure), also called feedback control system, is a system of measured values of output quantities compared with a desired given value, which produces a deviation signal, using this deviation signal to regulate the control, so that the output value is as close as possible to the desired value.

Application of closed loop: In analog circuitry, for amplification circuits, the so-called closed loop refers to the presence of a feedback loop. For example, in the case of a laptop power adapter, it detects the output voltage (mostly DC19V) and feeds it back to the front end as a regulated voltage, so that it outputs a constant voltage.

Expanded:

With a closed-loop, the final result of each single transaction will flow to the platform. mastered and recorded for the platform. And all these recorded transactions (the key is recordable) are the value of the O2O platform and the basis for tapping into greater value.

The indisputable record of specific transactions ensures that the platform has bargaining power over offline merchants. The accumulated consumption records specific to each user form the basis of big data, which can provide precise marketing to merchants and personalized services to users, thus further promoting the O2O cycle. Only in this way, O2O will become a real O2O, rather than being reduced to a simple advertising platform or classified information provider.

Baidu Encyclopedia - Closed Loop (noun explanation)

Baidu Encyclopedia - Closed Loop Control