Use 'win back' when something lost is regained, especially due to effort. After improving their services, the telecom company won back many former clients.
Pro Tip 2/3
Effort Implied
'Win back' suggests intentional actions were taken to recover what was lost. The celebrity worked hard to win back her fans after the scandal.
Pro Tip 3/3
Relationships Matter
Often used with interpersonal or commercial relationships. The brand launched a loyalty program to win back customers' trust.