The seed is a seed that can contain all the states of the universe, it might have to be pretty large. The seed is used to create a new universe from scratch. The time is how long the universe should run, specified in seconds, might have to be pretty huge as well. The description is a text describing where to find the actual compressed data in the universe. In case this text does not make any sense to the current civilization, the universe is fast-forwarded until time travel is possible and someone manages to understand the description.
The finder of the data then prints it out and holds it up for me to see.