This is the 221st most frequent Japanese word.
発売
"Release" or "sale."
The word "発売" is used as a noun in the passive verb form "発売されました" to indicate the event of a product being released.
このゲームは昨日発売されました。
This game was released yesterday.
Here, "発売" is used in the passive form "発売される" to discuss a planned release in the future.
新しいアルバムが来週発売される予定です。
The new album is scheduled to be released next week.
In this sentence, "発売" is used as a noun and appears as the object of the action verb "発表しました" to refer to the act of releasing a product.