“Related posts” section contains an automated selection of posts related to the article you are currently reading, and it’s one of the best possible additions to your website. The multiple advantages of such a section make it a must-have:

WordPress wp_nav_menu() function has lots of useful arguments for customizing your menu, but it’s missing an essential one: a menu item separator. For example, if you want to add a | (vertical slash) or a · (middot), or any other separator of your choice, the ideal solution would be to add it as a function argument like 'item_sep' => '·'

As you well know, WordPress decided to ditch Open Sans font, and use operating system defaults for the dashboard. This is an excerpt from the 4.6 version official release: “The WordPress 4.6 dashboard now takes advantage of the fonts you already have, making it load faster and letting you feel more at home on whatever […]

There are situations when the URL (website) field from the comments form is just an unnecessary clutter, for example when your “audience” does not have a personal website. In cases like this, the best approach would be to remove the field altogether.

The built-in function woocommerce_customer_bought_product can be used to check if a user has bought an item.