There are many reasons why many people like to drink coffee. For the billion population of this world, there is a suitable drink for someone. It can depend also on the season. For those who do not want to drink coffee, they may not understand why people like to drink it. But if you ask someone their reasons, there are plenty of it.
One reason is that coffee helps in waking up people. That is why many drink it anytime in the morning. They can have the boost of energy when they drink a cup of coffee.
That is why this is one of the most common answers of those who drink coffee. It is not just for that morning boost but also at any other time of the day. You can enjoy it being served hot or you can also have it when it has ice on it. That is why you can have it anytime of the day. You can just take a sip once in a while to have that energy need.
Another reason is that many drinks it to stay warm. When the temperature is freezing and you are sitting beside the fire, coffee is a good company.
Other people drink coffee when they reward themselves for things done even if small.
Other coffee drinkers have the reason for the relaxing effect. When they want to have some break time, coffee is a good one to have. If you also want to focus then you can take a coffee. Whether you want to be alone or you want to chat with someone, a coffee is a good one.