A parallel circuit is an electrical circuit in which components are connected side by side. A parallel circuit has several branches. Current can flow from any of its paths.
If any component is not working properly or broken, it does not affect the flow of current. In parallel circuit, the total current is the sum of current flowing through each branch. The current flowing in the circuit is shared by the components.
Each component is directly connected to power source receiving same voltage, so the voltage across all components in parallel circuit is the same.
The household appliances are all connected in parallel so that malfunctioning of one gadget does not affect the working of other gadgets. For example, we can start our T.V. without any need to turn on all other appliances at our home.