Cannot see Custom Field in my post

Creating a custom field does nothing on the front end. You need to display the codes by editing your theme’s template files.

The simplest function for the display of codes is the_meta() (function reference), which will echo all custom fields in an unordered list.

If you need more control over custom fields, then you would probably want to use get_post_meta() (function reference).

I will look into this.
Thank you.