When you go online in a public place, for example by using a public Wi-Fi connection, PCMag notes you have no direct control over its security. Corporate cybersecurity experts worry about "endpoints"—the places where a private network connects to the outside world. Your vulnerable endpoint is your local Internet connection. Make sure your device is secure, and when in doubt, wait for a better time (i.e., until you're able to connect to a secure Wi-Fi network) before providing information such as your bank account number. 

To further improve your Internet browsing safety, use secure VPN connection (virtual private network). VPN enables you to have a secure connection between your device and an Internet server that no one can monitor or access the data that you’re exchanging. Read more about What is VPN 

Marketers love to know all about you, and so do hackers. Both can learn a lot from your browsing and social media usage. But you can take charge of your information. As noted by Lifehacker, both web browsers and mobile operating systems have settings available to protect your privacy online. Major websites like Facebook also have privacy-enhancing settings available. These settings are sometimes (deliberately) hard to find because companies want your personal information for its marketing value. Make sure you have enabled these privacy safeguards, and keep them enabled.