In Drupal’s core library there are a number of utility functions and classes that, as a module developer, you will find make your task easier or less tedious.

Coding standards provide a set of rules for how your code should be formatted, and best practice guidelines for naming conventions and the location of files.

Comments are a content entity type that allows users to leave commentary associated with a specific piece of content.

Content modeling consists of identifying and constructing the different building blocks of data that compose the information on your site.

A content type is a subtype of the [content entity](link to Entity topic). When a content creator goes to add new content to the site, they are presented with a list of content types to choose from to get the appropriate form to fill out.

Drupal's content moderation and workflow tools allow you to configure and support a flexible multistep publication process.