In the following sentences:
나와 내친구들은 치맥을 사랑해요!
그래서 지난주에 대구 치맥 페스티벌에 다녀왔어요.
사람들이 정말 많았어요. 치킨도 정말 많았고요.
(Source: 연세한국어 듣기와 읽기 2 - p.40)
According to my dictionary, there is an entry in 고 that means the following:
Used at the end of a sentence, to express a question
However, all the examples use the interrogative tense.
남은 일은 누가 하고?
저녁밥은 누가 짓고?
So I'm not sure if it is correct. It also does not make sense in the context.
So what does 고 mean in the sentence and why is it used after all?
Here, -고 is a suffix (어미) meaning "and"; it's normally seen in between clauses like:
사람들이 많았고 치킨도 많았어요.
However, it can also be placed on the second clause if it's a separate sentence, so the emphasis is changed somewhat, and it means something like "also, too"; since it's now at the end of the sentence we can add 요 as well for more polite speech:
사람들이 정말 많았어요. 치킨도 정말 많았고요. "There were a lot of people. Lots of chicken, too."
Using -고 here connects the sentences better; if all your sentences just end in ordinary declarative endings (-았어요. --었어요. over and over) your speech / writing will lack cohesion; this is one way to make the sentences flow better together.
