Many years ago, search engine results were pretty much static. For a specific query, the SERPs were almost the same for every user. Going forward, search engines became more sophisticated and now the results for a specific query vary, taking many factors in to considerations.
One of these factors is the location from which the user is making the query: two people in two different places might receive different search results for the same query. Other factors taken in to consideration by the search engines include what the user searched before and what the user actually clicked before. Nowadays, the SERPs are very different and are personalized based on the user.