WordPress general
How To Put WordPress Site Into Maintenance Mode
How to increase Maximum Execution Time for WordPress site
How to Increase the WordPress Maximum Upload File Size
Running database queries in WordPress
Fixing the WordPress email Return-Path header
Adding Custom Fields to a Custom Post Type, the Right Way
https://codex.wordpress.org/Creating_a_Static_Front_Page
https://optimizerwp.com/wordpress-child-theme/
https://codex.wordpress.org/Child_Themes
WooCommerce
How to Setup WooCommerce Pages Using Shortcodes
WooCommerce Documentation
WooCommerce Developer Wiki
Product thumbnail size not editable after last update
The Ultimate WooCommerce Checkout Customization Guide
Add a Message at Top or Bottom of WooCommerce Checkout Page
The reality of refunds for digital products
Theme support
https://wordpress.org/support/theme/sparkling/
https://www.google.se/search?q=content-single+not+loaded+from+child+theme