Nameservers Added But still shows "Awaiting External DNS

I have added the nameservers to my DNS provider. But still, this error gets. And also should I have to add DNS records???

Hello! You are halfway there. You’ve added your NS but you also need to add an A record as well as CNAME record at the domain registrar:

Type Name Value
A @

Add these, give it some time to propagate, and then you should stop seeing that notification.