Renewal grace period:
Your domain name will be placed on hold, meaning that viewers will no longer be able to get to your website.
Within 5 days after your registration expires, we'll send an additional expiration notice via email to the registered name holder (registrant).
This message will include instructions for renewing your registration.
There is no additional fee to renew during this time period. Renewals will be charged at the standard rate.

From days 31 to 60* after expiration:

Restoration grace period: Your domain name will be prepared for deletion.
What this means is that we'll contact the manager of the registry (the top-level domain) where your domain is located. Then the registry will disable DNS resolution to your domain.

From day 31 to day 60,

you may still be able to restore your domain name, but there will be an additional fee to restore it.
The restoration fee is set by the registry.
Each top-level domain (TLDs) or domain endings will have its own fee.
See the Domain ending (TLD) reference article for your domain to learn about the restoration fees.