What does renew lease mean

It just means your device’s leased DHCP assigned IP address expired for the network and that device needs to renew its IP lease to reconnect. DHCP only assigns an IP for a day ir so and then it needs to either be auto-renewed by the network server, or re-assigned by a request from the device.

Basically it means you’ll be retrieving a new IP address and routing data from the DHCP server (or wireless router).

If modem-router you're trying to join is managing DHCP and/or "mac addresses" services, you can be asked to renew your DHCP lease.

Regards

Giulio