Here is what I don't understand, are silos pages that have more competitive keywords that you want to rank for? Or are they just a way to group pages? Here is my dilema I have lots of different types of product keywords, e.g. portable robots, wooden robots, small robots, etc. These are all types of robots so do I group them under one silo e.g. "Types Of Robots"? That type of keyword ("Types of Robots") wont get searched very much though so do I group them under that silo or make them all individual silos?