Exactly. It is used as a replacement for the mechanical bed probe. Instead, the hotend pushes down directly on the printbed when probing. This pressure is detected by the FSRs. An attiny converts this analog signal into a simple on/off signal which is read in as a normal endstop.
If you search around a bit you will find the schematics and everything you need.
In my experience it works quite well. A lot better than the mechanical bed probe.