This is the 739th most frequent German word.
sodass
"So that" (used to indicate purpose or consequence).
In this example, "sodass" connects the manner of the action (speaking quietly) with its consequence (no one could hear them).
Er sprach leise, sodass niemand ihn hören konnte.
He spoke quietly, so that no one could hear him.
Here, "sodass" is used to express a cause-effect relationship: the bright sunshine enables the children to play in the park.
Die Sonne schien hell, sodass die Kinder im Park spielen konnten.
The sun was shining brightly, so that the children could play in the park.
Here, "sodass" introduces a result clause, connecting the main action (informing early) to the outcome (being well prepared).