What is pfSense used for?

It is used as a router, firewall, VLAN, NetStat, DHCP server, etc.

pfSense is a a preconfigured operating system and suite of tools for directing traffic between your LAN and the Internet. The community version of pfSense enables you to build your own router using hardware that you provide. I believe pfSense also markets hardware which runs its router solution.

It is used as a free software device as a firewall and router. I use it quite a bit for NAT, bandwidth restriction, DHCP,

The term "firewall" is the same in English, referring to a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.

Flexible routing and extensible firewalling, plus various other services.

pfSense allows the individual to custom design routing, firewall, and VPN protocols among many other functions. It is designed for the home-lab administrator, like myself, or for enterprise-level command and control. The only limitations of pfSense are the possible limitations of the individualʻs imagination. If you want to stay shallow with network control, pfSense is there for you. And, likewise, if you are a professional IT administrator, responsible for either a part or the whole IT structure of a company, pfSense is also there for you. I think you are ready for psSense if you are here, asking this question!

Router, firewall, VPN server