Domain Registrar ↔ rent out a domain name, propagate domain name UID out to servers
namecheap.com
ends up costing more than Google - when adding in same feats/addons - also renew prices are higher/inconsistent
buy domains through Vercel
faster than Netlify, possibly better CDN/edge network
porkbun - handles Let's Encrypt for you
Google Domains
good UX, just works