Segments are subset of contacts, based on certain criteria. In Microsoft Dynamics NAV we can make subgroups of targeted contacts by making use of the Segmentation functionality. But before we can create such segmentation, we need to check if we have sufficient information and parameters to base our segmentation on!
So, the question is what information can we use to make segments? Well, the good news is that in Dynamics NAV you can use nearly all the contact information to make your segments and some information holders are specifically designed to fulfil this function.