How to setup Customer metafields?

Show Customer metafield in your customer accounts page needs to insert below code in customers/account.liquid file.
customers/account file path: Login into Admin panel-> left side menu select Online store -> select Themes.
Now left sidebar load with file list. Check at Sections bottom of the list “customers/account.liquid” file, click on it.
Insert below code where you want to show metafield at this position in the file and save it.
{% include 'all-in-one-metafields', metafields: 'customer' %}

For a quick view of all the above step check the below image