Google Contacts has a built-in feature that can merge these duplicates, making your contact list cleaner and easier to navigate. This feature is especially helpful if you've synced contacts from ...

Google Contacts or Device settings. Before attempting to restore your contacts, back up your Android so you have recourse if you lose data.

Getting a copy of your Google contacts is always a good practice to maintain. That way, you'll be much more likely to keep them over the long-term - even if, say, you somehow forget your account ...