The People Dictionary contains a structure for people, consisting of Department, Job Title, and Location. When the Crawler crawls over the people profile store it extracts these field values and populates the values of these fields in the term store under the People node. The terms values provide distinct values for searching people – for example, we can search or filter all people by a specific location and job title, using specific values in the term store.
we can sort the results of a people search by their social distance to you or by their relevance to your user profile. The social distance is the relationship between you and the people in the search results as defined by your position in the organization. When the sort order is by social distance, your colleagues appear first in the results, followed by the colleagues of your colleagues. After showing the colleagues of your colleagues, everyone else appears in the results.