A registrar is the company where you bought and renew your domain name.
GoDaddy, Namecheap, Cloudflare and many hosts all sell domains. The registrar holds your ownership record and bills you yearly. It usually also hosts your DNS records.
Keep the registrar login in your own name and your own email. Many owners lose access because a former web person set it up. Recovering it can take weeks.
ThinkBright is not a registrar. Your domain stays with you at your current registrar. We only ask you to change a record or two when the site goes live.
Nameservers are the servers that answer DNS questions for your domain.
DNS is the phone book that turns your domain name into the address of the server that holds your site.
Lock-in is when leaving a tool costs so much that you stay whether or not it still serves you.
An A record points your domain name to the numeric address of a server.
Paste your URL. We rebuild it, show you the match, and measure the speed. No template. No blank page. Human review from start to finish.