Ethernet is a technology that allows computers on a network to talk to each other. This means they do not need to create multiple networks as they share the same IP address. Ethernet is a business class product with a business SLA. SLA is when the cost of lost connectivity is much greater than the price of the line itself.
We would advise a business to choose Ethernet internet connectivity when your main priority is reliability and you need your online materials to be constantly available.
Ethernet connections are generally for business solutions or for critical healthcare operations.