Americano Coffee｜Why are the Americano coffees in different coffee shops so obviously different in taste? What are the characteristics of a good cup of American style?

To start a delicate working day, a cup of freshly ground coffee is often all that is needed, and American style is the first choice for countless office workers. No matter what kind of factors, American style is always the "backbone" of a coffee shop, so in many cases its taste will directly affect people's first impression of the shop, and even make people say "even cups"