They give you an IP address, maybe ipv6 or a static ipv4 address if you pay more. They compete on quality of service, network policies, backhaul capacity, price

They give you an IP address, maybe ipv6 or a static ipv4 address if you pay more. They compete on quality of service, network policies, backhaul capacity, price, necessary services like DNS, extras like email or bundled Netflix subscriptions, etc, etc. Some of these qualities are more legible than others.