What are Digital Certificates?

When a user connects to a website via HTTPS, asymmetric encryption is used. For that to happen, the user uses the server’s public key to initiate the connection. To confirm the authenticity of that public key, certificates are used. The certificate will have details such as who does this certificate belong to, who issued it, a serial number, expiration date and the public key.
This can establish trust where the certificate and the key can be trusted and thereafter the communication between the user and the server is also trusted.