An SSL certificate (technically TLS now, though "SSL" remains the common term) is what lets a website load over https:// instead of plain http:// . It encrypts the connection between a visitor's browser and the website's server, and it's what puts the padlock icon in a browser's address bar.

Practically, every modern website needs one: browsers actively warn visitors away from sites without valid SSL. SSL certificates are issued by certificate authorities, and they're typically obtained and installed through whichever company is hosting your website, not through your domain registrar.

NameBright doesn't offer SSL certificates as a product; you'll get one through your web hosting provider (many hosts include free SSL via Let's Encrypt or a similar provider as standard) or a dedicated certificate authority. For advanced setups, a CAA DNS record can restrict which certificate authorities are allowed to issue a certificate for a domain at all (see DNS Record Types, Explained), but NameBright doesn't support adding CAA records, so that particular safeguard isn't available for domains using NameBright's DNS.