Backing up your iPhone is a great way to ensure your data is safe! You can use iCloud by going to Settings > [your name] > iCloud > iCloud Backup, then tap "Back Up Now." Alternatively, you can use a computer: connect your iPhone and use Finder on Mac or iTunes on Windows to create a backup. Have you tried backing up your iPhone before, or is this your first time? What parts of the backup process are you most curious about?