Not two people can be found who are exactly alike on all these three levels, which is why the urban environment is largely a mental construct.
The term “use significance” implies that people have an innate disposition to interpret the daily environments they are exposed to according to an idea called setting for activities. This idea varies from person to person. Some activities which are personally valuable for one person might be totally insignificant for another person. So, if a certain physical environment does not offer any personally meaningful activities to one person, it will of no use or significance for him/her, but same cannot be said for every other person too. The most important factor by which people tend to analyse locations or environments is this use significance. In my daily physical environment, my college campus, the local library, and the coffee shop are some of the things which have use significance for