This is the 1445th most frequent Russian word.
знают
"(They) know."
Here, "знают" is used to indicate people’s knowledge about a fact or situation.
Люди знают правду.
People know the truth.
In this sentence, "знают" is used to express familiarity with a procedure or course of action.
Они знают, что делать.
They know what to do.
Here, "знают" signifies recognition or familiarity with a specific song.