Is WebSEAL a reverse proxy?

Could you please clarify if WebSEAL functions as a reverse proxy in its operation? I understand that it's often used in conjunction with IBM Tivoli Security Access Manager, but I'm unsure if it specifically acts as a reverse proxy server, intercepting and forwarding requests from clients to internal servers on behalf of those clients. It would be greatly appreciated if you could provide a concise explanation of its role in this context.