Why would it be a bad idea for gateways to pass broadcast packets between networks? What would be the advantages of doing so

Gateway

A device that may be server or router in a network used to control the flow of traffic between two networks is called Gateway. These networks are different from each others.

It have both disadvantages and advantages as well.

Such as

If we use gateways in all the networks, it may cause traffic congestion whenever all the networks broadcast data,

The advantage of these gateways is that, If we limited number of networks broadcast data then there is no need to store the information of network.

Another advantage is that, it is used to interpret the data from different networks having different protocols.