I tested this while comparing a few retail and travel sites that changed prices, delivery options, and banners depending on location. My regular connection still showed some generic international content, even after switching the browser language to Italian. For a cleaner comparison, I opened the same pages through an italy proxy and kept the rest of the browser setup unchanged. The regional differences became much easier to spot, especially around local offers and availability. I also repeated the checks in fresh sessions because cookies sometimes affected the result. For this kind of work, a residential Italian IP is useful because it removes some guesswork and gives a more realistic view of what a local visitor might actually see.