Three reasons: the stimulating effect of caffeine, an enormous flavour complexity with over 800 identified aroma compounds, and the social function as a ritual in nearly every culture.

Why Is Coffee So Popular?

Three reasons: the stimulating effect of caffeine, an enormous flavour complexity with over 800 identified aroma compounds, and the social function as a ritual in nearly every culture.

Why that matters

The most obvious factor is caffeine. It blocks adenosine receptors in the brain, suppressing the sensation of tiredness. The effect kicks in after 15–30 minutes and lasts 3–5 hours. No other legal stimulant delivers a wakefulness boost so reliably and quickly. Around 2.2 billion people worldwide consume coffee daily — making it the most-drunk beverage on Earth after water.

The second factor is flavour complexity. Coffee contains over 800 identified volatile aroma compounds — more than wine (around 400) or chocolate (around 600). Depending on origin, variety, processing, and roast, coffee can taste of blueberry, chocolate, nuts, citrus, caramel, or jasmine. This complexity keeps it interesting: two coffees from the same country can taste completely different.

The third and often underestimated factor is the social function. Drinking coffee is a ritual in almost every culture: the Italian espresso at the bar, the Swedish fika, Turkish mokka during family visits, the German “Kaffeeklatsch.” Coffee creates conversation, structures the day, and marks pauses. The coffeehouses of the 17th and 18th centuries were hubs of intellectual exchange — and modern cafés serve a similar purpose.

There’s also a fourth aspect: coffee is affordable. Even high-quality specialty coffee costs less than one euro per cup when brewed at home. Few other indulgences offer so much sensory complexity for so little money.

At Green Wall Coffee

At the counter on Sophienstraße 27 in Berlin-Lichtenberg, I see all three reasons daily. Some guests come in the morning because they need the caffeine kick. Others come for the flavour — they want to try the new Ethiopian filter coffee. And others simply come because the café is their “third place”: not home, not work, but a spot where they can settle in. Coffee unites all three needs in a single cup.

Related Questions

• What is coffee, exactly – plant, bean, or beverage?
• How much coffee do Germans drink per year?
• How many coffee species exist worldwide?

More depth on this topic in the article How to Make Perfect Espresso. Or stop by at Sophienstraße 27 — Mon–Fri 8am–5pm, Sat 10am–5pm.