Guide
Looking for a solution for your problem? Here are guides on using Meta Box and WordPress plugins/code to solve them.

How to Export and Import Custom Fields with MB Builder?
Other ways to clone custom fields from one site to other sites without touching any line of code. Simple for all, even non-developers!
How does WordPress Store Custom Fields? #2 Database
The way WordPress stores and organizes custom fields in the database. It's structure, advantages, disadvantages, and how to deal with it.
How to Create a Group of Custom Fields with MB Group
Make your meta boxes and custom fields look better with MB Group. A great and easy way to group all types of fields.
How does WordPress Store Custom Fields? #1: Data flow
This post is 1st part of the answer to the question: “What really happens with custom fields when I click Save post?”, and details of data flow.
Applications of Custom Fields in WordPress
Custom fields application is unlimited and flexible. Learn more how to use custom fields to create websites for travel, e-commerce, F&B, and many other industries.
Get Posts by Custom Fields in WordPress - Part 1
An easy way with step-by-step instruction to get posts by custom fields to have an advanced search on your WordPress site.
How to Create Custom Meta Boxes & Custom Fields in WordPress?
Step-by-step guide on creating custom meta boxes and custom fields in WordPress for beginners. Get custom fields values and integrate with themes.
Easy Way to Add Custom Fields in WordPress Without Plugins
The simplest way to add custom fields in WordPress: enable, create, display each type of custom field. No plugins and no coding here.