Parallel connection is a better way to connect lights and other appliance in domestic circuit. It is because-
(a) When we connect a number of devices in parallel combination, each devices in parallel combination, each device gets the same potential as provided by the battery and it keeps on working even if other devices stops working.
(b) Parallel connection is helpful when each device has different resistances and requires different current for its operation as in this case the current divides itself through different devices.