This is the 362nd most frequent Japanese word.
無料
Free of charge.
In this context, "無料" is used to indicate that attendance requires no payment or fee.
このイベントは入場が無料です。
Entrance to this event is free.
Here, "無料" denotes that the coffee offered does not cost anything.
無料でコーヒーを提供します。
Coffee is provided free of charge.
In this sentence, "無料" refers to software or an application that is available without payment.