Backups replace unannounced & substitute players in your team at the match deadline.
So, if your selected team has players who are not available after lineups, backups increase the possibility of having all playing players.
The multiple benefits for you include:
- If there are any unannounced or substitute players, Backups will replace them in your team so that you don't lose out on points.
- You can play more matches even if you are not available at match deadline, to update your team. You can just choose your Backups who will automatically replace any unannounced players in your teams.
For a better understanding of how to use the feature, you may refer to this link.