Dynamic Host Configuration Protocol - automatically assigns IP addresses to devices on a network. Like having an automated reception desk that gives each visitor a temporary ID badge.
When you connect to WiFi, DHCP automatically gives your device an IP address so it can communicate on the network.
DHCP is an open networking protocol, not a cloud-specific managed service. In cloud networks, DHCP-like IP assignment is typically built into the virtual network/subnet fabric (e.g., IPs are allocated automatically to instances/VMs), and you usually don’t run a standalone DHCP server unless you have a special hybrid or custom networking requirement.