understanding ssl certificates code example

Example 1: ssl certificates

A SSL certificate is required for all SSL transactions.
SSL allows for authentication and encryption for website connections.
There are two types of certificates:
- Self signed: generated by applications
- CA signed: generated and signed by CAs (Certificate authorities)

Self signed certificates are often used in testing environments whereas CA 
signed ones are what you should use in production. (may cost cashinga)

Example 2: what is an SSL certificate

An SSL certificate is a type of digital certificate that 
provides authentication for a website and enables an encrypted connection. 
communicates to the client that the web service host 
demonstrated ownership of the domain to the certificate authority 
at the time of certificate issuance