What is VPN and Why shouldn't you use free VPN

      A VPN or Virtual Private Network is a method of to add security and privacy to any network whether it is in public or in private domain like public Wi-Fi or the internet itself. It is most oftenly used by various big MNCs, large corporate sectors to protect their sensitive data from anonymous users, government or hackers. For sake of complete privacy like hiding your internet activities from ISP or government, allows you to spoof your location and many others, you need to use VPN services.

      The First question arises, How does VPN protect our online presence even from the ISP.  The answer is here. Whenever you connects to the internet request for any website, that request first sent to your ISP which further contact with domain web servers where that site is located. As your all internet traffic passes through the ISP servers and continuously monitored by their servers. In case of VPN, you connects directly from the VPN servers via an highly secured and encrypted channel generally known as VPN Tunnel. This tunnel is encrypted in such a way that only you and VPN server can see the data, Nobody else can spoof your data on mother earth. 

Pros and Cons of using VPN

• Your data is highly encrypted and secured. i.e. Even your ISP can't spoof on your online presence. All it can see that you're connected to the VPN server.
• You can access those URLs(depends on your VPN server location), which are restricted by government in your country. As soon as you start VPN server, your IP address appears to be the VPN servers' address instead of address provided by your ISP.
• You can use public Wi-Fi and hotspots without any second thought in mind because it encrypts data in such a manner that even "evil twin" or "packet sniffing" techniques can't decrypt data.
• You might face internet slow down problem depends upon the VPN server location because your data packet routed through the VPN servers instead of directly accessing to the websites. Also, Some of your processing power also consumes in encrypting and decrypting the data, which reduces your internet speed.
• The only and last thing you need to consider mostly is that your data is visible by the VPN service providers. So, intelligently choose your VPN service providers. 
• The best choice is to choose a paid VPN service like ExpressVpn, which can be affordable by anyone and provide one of the most secured and latest encryption techniques.

Why shouldn't you use free VPN services

• VPNs are supposed to keep your data safe from ISP by providing point to point encryption through tunnel. But you practically don't know who's on the other side. They may track your data and sell it to other peoples.
• If you still using Free VPN, It is wise idea to not to share any sort of sensitive data or information especially like- Passwords, Banking Information etc.
•  Some VPNs apps or softwares turn your connections into end-points. i.e. They use your connections to increase their network's Bandwidth and offers this portal to another users.
• The VPN tunnels are supposed to be highly encrypted which requires a lot of maintenance and expenditure. No one is foolish enough to provide all these facilities for free. There may be many security faults and issues or lack of maintenance. This acts less like a VPN and more like a honeypot to the Hackers. Also your IP can also be leaked or exposed to the internet.
•  As we already know, No one gonna provide this kinda facilities for free. They must be making a huge profit, so that they can provide you these facilities. They make money from advertising media. Thus, leads to a slower page loading.