If you occasionally use public wifi, you realize your computer is subject to possible hacking -- someone being able to 'see' what you're doing. If you should have an interest in reading three articles about how to protect your computer, read here and here and here.
One of the ways to protect yourself on public wifi is never enter anything on your computer you wouldn't want the world to see. A better way, though, is to protect yourself by using a VPN (Virtual Private Network), as the last article mentions. The article mentions two free VPN's that are available to be used: Hotspot Shield and CyberGhost.
I have both of these installed and use one or the other when I'm on public wifi. Is it necessary to use a VPN, you might ask? It depends on you and how secure you want to be. Both these programs are easy to install and use, and they're free (although paid versions are available, of course). What's not to like about this scenario? Free protection.
When you first open CyberGhost you'll get a notice that you can't use the free version right away as there are people in line waiting to use it. In my experience it only takes about a minute or two and your turn will come up. Now, why are these VPN's providing a 'free' service? They obviously can't stay in business doing this for everyone. They have advertising on the free versions, and they hope you will eventually upgrade to the paid version, which I've done.
Just some thoughts for your protection on public wifi.