People visit because they want to get a feel for fit of the campus.
You’ll be living there for four years. You’ll be going to local restaurants, shops and using the town facilities. If you feel that the school town is too small/large, too rural/suburban, too far/close, then you will find out immediately with a visit. You’ll be able to take off schools on your list of applications.
We live in California and for some reason, a number of students tend to think and assume that all California schools are on or near sunny beaches.
My daughter had this experience in Davis. UC Davis is in the middle of farm country. One day, one girl from her floor, came into my daughter’s room wearing a swimsuit. The girl said, “how come everybody on this floor keeps laughing when I ask them how to get to the beach??”
The three girls in the room just stared. They had assumed the girl was going down to the pool. The roommates explained, “The beaches are on the coast. You need to take a train to the coast, and even then, you need to get from the city, to the shore, by Uber. It’s cold water and choppy. No one really swims there”.
The girl looked, apparently, dumbfounded. My daughter’s roommate had a train schedule with a map and its stops. She pulled out the map and showed the girl, the stops. At this point, the girl in the swimsuit said, “No, this is a California school; its supposed to be near the coast”. She explained that she was from Arizona and wanted to go to a California school to be near a beach. Apparently, geography wasn’t a course that she took in high school.
The point is, you visit to see where you’re going to spend four years of your life making friends and connections and understanding what will be available to you. You have those four years at that site, so it had better be something you want to experience.