Steps:

Log in to your Domain Registrar account (GoDaddy, Namecheap, etc.).

Locate the DNS settings for the domain you want to update.

Find the option to Add a new record (it might say "Add DNS record").

Choose the record type (A, CNAME, MX, TXT, etc.) depending on what you need to add.

Fill in the required fields (hostname, IP address, TTL, etc.).

Click Save to apply changes.