If you are a WhatsApp user and have iCloud enabled, then you can easily backup your chats and messages by using the iCloud Backup feature. To use the iCloud Backup feature, first open up your iCloud account settings and click on the “Backup” button. Then select the “WhatsApp” chat or message you would like to backup. After selecting the chat or message, click on the “Backup” button to start saving your chat or message to iCloud.
Open WhatsApp on your iPhone. Tap Menu > Settings > Chats > Chat Backup. Tap Back up to iCloud. Tap Back Up Now. To restore a WhatsApp backup from iCloud:
How to Restore WhatsApp Messages from iCloud to Android
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