Secure online communication refers to the methods and technologies used to protect the exchange of information over the internet. This includes using encryption, which scrambles data so that only authorized users can read it. Common tools for secure communication include VPNs, SSL certificates, and secure messaging apps like Signal or WhatsApp. To ensure secure online communication, users should follow best practices such as using strong passwords, enabling two-factor authentication, and being cautious about sharing personal information. Regularly updating software and being aware of phishing attempts can also help maintain security while communicating online.