The pin colour / stage signifies that a team has done their part in the process.
Here are the pin colours you may see:

I don't see all colours... Why?
If your current process do not involve that many stages, it is not necessary to use all built-in stages in SnagR.
There are other colours on the plan. What do they represent?
 Late issues: this has passed the due date
  Late issues: this has passed the due date
 Not my issue
  Not my issue  
 Not a defect
  Not a defect
 This is a multi-plot. It organises pins together so pins on the same location do not overlap on each other.
 This is a multi-plot. It organises pins together so pins on the same location do not overlap on each other.
