Search engine optimization (SEO) is the process of optimizing your online content, so that your content will rank higher in organic (non-paid) search engine results.

Learn to use data from your Drupal site to create customized lists in various forms, such as bulleted lists, grids, calendars, or sliders.

Learn about Drupal’s configuration system and how to manage configuration with both the administrative user interface and command-line tools.

Drupal includes the PHPUnit testing framework. This enables us to write unit and functional tests to attempt to minimize the number of bugs in our application.

Tools and workflows for deploying code and configuration changes from one environment to another with Drupal-specific considerations.

Debugging is the practice of troubleshooting an application through the use of tools and processes in order to find and fix bugs, or better understand the underlying code.

Drupal manages information and access for all visitors to your site, called users, through a system of roles and permissions.

Devel is a popular developer module containing a variety of developer and debugging utilities including Webprofiler, Devel generate and Kint.

The process for keeping Drupal core and contributed modules and themes up to date with the latest security and minor version releases.

In order to run a Drupal site, the web server you are using must meet minimum technical requirements.

Search provides internal site keyword search for content and users.

Drupal's vendor-agnostic database abstraction layer provides an API that can query different underlying databases.

Taxonomy in Drupal provides a way to classify your site’s content. Taxonomy vocabularies are created with terms within those vocabularies.

Patches are used to describe modifications made to one or more code files, and can be used to share those changes.

Entities are the fundamental building blocks that make up any Drupal site. Having a good understanding of the Entity system is an important part of ensuring the data model of your Drupal site is set up properly.

Modules are bundles of primarily PHP code that extend Drupal in order to add new features or alter existing functionality.

Responsive web design is a set of design approaches and development best practices that ensures that a web design can be used on many types and sizes of devices.

PHP: Hypertext Preprocessor (PHP) is a popular interpreted programming language that is especially suited for web development. Drupal core and all contributed modules are written in PHP.

Upgrading is the process of moving your site from a previous major version of Drupal to a newer version, for example from Drupal 7 to Drupal 11.

As an open source project, Drupal depends on community contributions in many forms including documentation, code, translation, speaking, organizing events, mentoring others, and even donating money.