An SSL certificate or Secure Socket Layer is a separate security protocol, which is used by web browsers and web servers, to protect users' personal data when visiting a website.
The SSL certificate contains “public” and “personal” key, through which the information is automatically verified and encrypted. This means, that when a user visits your website, which has an SSL certificate enabled the server uses “the public one” key, to provide an encrypted connection to the browser. The browser automatically confirms, when the certificate is valid, that its owner has verified it and visiting the website is secure.
It is important to secure your website, so that users can have peace of mind about their personal data when visiting your website and do not have to worry about browsing and searching for information on it.