Jon makes an excellent point (sorry!). I am in the camp of using signals to show if a point is set in a particular direction so I try to have 2 signals per point, and at any time one is green and the other red to show which way the points are currently set.
My use of the term "syncing" is simply to describe the process of a change in point direction also triggering a change in signal from Red to Green or vice versa. I guess a more accurate description of what I have is "linked operation".
From previous posts, I'm assuming you're going DCC rather than analog for your control system so you'll need a "switch decoder" (e.g. LGB item 55025, Massoth equivalent item 8156101) to which the motors that drive points and signals are connected. The decoder interprets the instructions from your DCC controller to set points / signals in a particular direction.
With this switch decoder in place, you then have options for achieving linked operation - e.g. you could both a point and a signal to the same outlet so they operate together, if you plump for Massoth as your control system you could create a "switch route" which, when activated, sends instructions sequentially to several points and signals. I have no in-depth experience of other DCC systems, but I imagine they offer similar features.
As always, the choice is largely down to you as it's your railway. Your decision how you want to operate it will influence how many signals, where they are located and the degree of alignment with full-size railway operating procedures you want to achieve. Other GSC members can then give you any specific advice you may need on how to implement your choices. I have benefited hugely from the collective knowledge on signalling and electronics to help me implement something that I initially thought I wouldn't be able to do.
Lastly, attached are a couple of photos I took just after installing some LGB signals on my layout. Hope all of the above helps.
