SSH tunneling is a method of transporting arbitrary networking data over an encrypted SSH connection. It can be used to add encryption to legacy applications. It can also be used to implement VPNs (Virtual Private Networks) and access intranet services across firewalls.
SSH is a standard for secure remote logins and file transfers over untrusted networks. It also provides a way to secure the data traffic of any given application using port forwarding, basically tunneling any TCP/IP port over SSH.
We can improve the security of data on your computer when accessing the Internet, the SSH account as an intermediary your internet connection, SSH will provide encryption on all data read, the new send it to another server.
Using SSH accounts for tunneling your internet connection does not guarantee to increase your internet speed. But by using SSH account, you use the automatic IP would be static and you can use privately.