Smps Manufacturer I Have Got A Machine Where The Manufacturer Has Used A SMPS For DC Output Voltage?

I have got a machine where the manufacturer has used a SMPS for DC output voltage? - smps manufacturer

1) The data SMPS Input Voltage: 230V AC and Output Voltage Requirements: 24V DC 6 amp. They used the voltage at the solenoid (24VDC).
2) The SMPS is a capacitor (2200mF) of the output voltage (+ 24V and 24V is connected). What is the use of a capacitor?
3) If the condenser is removed, what would be the outcome?
4) What is the capacitor?