NPC has Skilled V = +5 bonus
This NPC effectively has 5 ranks in whatever the skill is that is listed with the Skilled trait. That means his result caps are 25 when using this skill. It also means that he could gain a synergy from this skill if applicable to another check he was making.
I was unaware that NPCs got skill synergy bonuses. I thought their competence and skill bonuses were designed to sweep under the rug most modifiers that PCs get (ability scores, synergy bonuses, insght bonuses, etc.).
Actually, I was unaware, too, until I reread the sections for this thread, but when it said "[w]hen making checks [snip] an NPC's ranks in a skill are considered to be equal to his skill bonus or Competence, whichever is higher" I took another look at it. I belive from that statement, that they would get synergies.
However, if I had never noticed that and never used synergies for them, I doubt I would have ever cared.