Wildcard SSL is a certificate that secures the main domain (domain.ru) and all its subdomains (*.domain.ru) — it is profitable and efficient.
The main difference from a regular certificate is that a Wildcard SSL certificate can be copied and downloaded to as many servers as necessary to host the primary domain and all its subdomains. In other respects, the Wildcard certificate works in the same way as a regular certificate and provides a secure connection between the website and browser. Once installed, all traffic between the visitor's browser and any of the secure server certificates will be encrypted.
Wildcard-type SSL certificates are beneficial if your website has a large number of subdomains — it will protect them all. For example, if you host a product catalog, blog, or any other project on subdomains.
✓ You pay for one certificate for all domains at once
✓ Accessibility for individuals and legal entities
✓ Easy to manage
✓ Browser compatibility
✓ 24/7 support