As you know, a VPN works by rerouting your Internet traffic into servers located in different parts of the world. For example, let’s say you are in the US and you want to appear as if you are accessing the web from the UK. A VPN will route your traffic to a UK server.
Now, ideally, this process should happen so fast to a point where you won’t even notice the complicated web traffic movement. However, it’s very likely that you will experience very slow speeds when using a free VPN service.
And it’s not hard to see why. Since the service is free, it means the VPN provider will not be dedicating too many resources to free clients.
We also know that there are many free VPN users. This, therefore, means that you end up with millions and millions of people using limited computing resources. In the end, the performance and speed of your VPN become massively degraded.