Difference between VPLS and VPLS BGP signalling

Just want to know if the main difference is bgp VPLS is for multiple sites and VPLS is for an additional site? Is this correct. Also please explain in detail if possible. Thanks

BGP is a bit more complex than LDP, but it’s a better fit for large-scale VPLS deployments:

https://help.mikrotik.com/docs/display/ROS/VPLS