The cleaner canvas also lets us show local information in entirely new ways. As you explore the new map, you’ll notice areas shaded in orange representing “areas of interest”—places where there’s a lot of activities and things to do. We determine “areas of interest” with an algorithmic process that allows us to highlight the areas with the highest concentration of restaurants, bars and shops.
Проще говоря, оранжевые районы - это места, где можно быстро потратить много денег, а серые - всё остальное.