What does Deuteronomy 21:13 mean?

and take off the clothes she was wearing when you captured her. She should stay in your house and mourn for her parents for a full month. After that, you can sleep with her and she’ll become your wife. Deuteronomy 21:13 - Modern Text Bible

(She’s given a month to mourn her old life and family before any relationship begins. This is meant to give her dignity and space before marriage.)