This article provides an overview of SSL certificates and their importance in securing websites. It explains SSL encryption, its advantages such as data security and authentication, improved search engine rankings, and protection against phishing attacks. The process of generating a self-signed SSL certificate for NGINX is outlined, along with the limitations of self-signed certificates. It introduces Certificate Authorities (CAs) that issue trusted digital certificates and emphasizes Let’s Encrypt as a free open CA integrated with Certbot for automated obtaining and renewal of SSL/TLS certificates. Instructions on installing Certbot and obtaining an SSL certificate are provided.