Iced tea is a staple of American Southern life; it is very popular throughout much of the United States , enough so that it is now being marketed in cans and bottles.
Good iced tea uses a decent brand of black tea which is then cooled (either in a refrigerator or by being poured over ice). Some people add sugar others don’t. Some people also like to add lemon.
Iced tea is very easy to make. Infuse a strong concentrate of tea (i.e. much less water than you would use for that amount of leaves) and add it to cold water to the right proportions. The better the quality of the tea, the better the iced tea will taste. It’s probably a good idea to use a strong-tasting tea that can stand up to the cold. Assam , for example, makes terrific iced tea.