The change of a previously free service or facility into one that requires payment; often used as 'to make paid' (有料化する).
このアプリは来月から有料化される予定だ。
This app is scheduled to become paid starting next month.
サービスの一部を有料化して、品質の向上に投資するという判断だった。
They decided to make part of the service paid in order to invest in improving quality.
公園の駐車場が有料化され、無料だったころと利用者の数が変わった。
The park's parking lot became paid, and the number of users changed compared to when it was free.