This is the 6025th most frequent Russian word.
собрано
"Собрано" means "collected" or "assembled."
Here, 'собрана' is the past passive participle of 'собирать', describing something that has been collected or gathered.
Эта коллекция была собрана за многие годы.
This collection was gathered over many years.
In this context, 'собранно' is used to describe a condition or result of gathering items together.
В комнате было собранно всё необходимое для работы.
Everything needed for work was collected in the room.
Here, 'собрано' functions to indicate the completion of the action of collecting facts.