This is the 960th most frequent Russian word.
состоялось
"Took place" or "occurred."
Here, 'состоялось' is used to indicate that an event (the meeting) was held or occurred.
Заседание совета директоров вчера состоялось.
The board of directors meeting took place yesterday.
In this sentence, 'состоялась' conveys that an exhibition occurred or happened, focusing on the event's realization.
В новой школе недавно состоялась выставка ученических работ.
An exhibition of students' works recently took place at the new school.
Here, 'состоялась' is used to express the fact that the wedding event happened or was successfully conducted.