What is the reason for connecting the electrical appliances in parallel

Explain the purpose of connecting electrical appliances in parallel

Because devices connected in parallel maintain an equal voltage potential between the hot and neutral. Amperage is split between the devices on the circuit. The voltage needs to be constant for motors and other electronic devices, but the amperage supplied can fluctuate depending on the power needed by the devices. Wiring circuits in series results in a voltage drop for every sequential device on the circuit. After the first or second device, there would not be a high enough potential for the correct operation of the next device.
Parallel connection guarantees that all devices in a circuit have the same voltage but draw their individual required current according to each individual impedances and power consumption. Thus two devices at 230V could have 25ohm and 50ohm internal resistances respectively. Hence they will each consume 1kw and 2kw respectively. (P= V*V/R) at same rated voltage. With a series connection, this would be impossible as each device would drop a part of the mains voltage and decrease downwards. Eg first device here would have taken 158V (6.32AxR1) out of the 230v available. While the second device requires 316V (6.32AxR2). Only the first device will come on besides 316v is unsafe for the second device rated at 230V.