Port forwarding, or tunneling, with SSH creates a secured connection between your computer and a remote machine that you can relay services or make other secured connections through. Because this connection is always encrypted, tunneling with SSH is a very useful and reliable way to transmit information over protocols that are normally not encrypted. SSH tunneling can also let you avoid network monitoring, network sniffers, bypass poorly contigured routers and/or gateways on the Internet, and more.
Note: Network filtering and monitoring is typically implemented for a reason. Even if you do not agree with the reason/reasons, bypassing them may lead to issues with your IT department.