What are most commonly functions used in WordPress?

1. Theme and Plugin System: WordPress features a vast library of themes and plugins, enabling users to easily extend and customize their websites. Themes handle the website's appearance and layout, while plugins add additional functionality. For example, the WooCommerce plugin transforms a basic website into a fully-featured e-commerce platform.

2. Block-based Editor (Gutenberg): WordPress's Gutenberg editor is a block-based editor that allows users to build content through simple drag-and-drop operations. This simplifies creating complex layouts without requiring any coding. For example, users can easily add images, videos, buttons, or separators.

3. SEO-friendly: WordPress natively supports SEO. The code it generates adheres to SEO best practices, with a clear site structure that is easily crawlable by search engines. Additionally, numerous plugins like Yoast SEO can further optimize the site and improve search engine rankings.

4. Responsive Design: Most WordPress themes are responsive, meaning they automatically adjust the layout to fit various screen sizes, from mobile to large displays. This is crucial for modern websites as more users access websites via mobile devices.

5. Multi-user and Role Management System: WordPress supports multi-user logins and assigns different roles and permissions to various users. For example, administrators can manage the entire site, editors can publish and manage articles, while authors can only write and publish their own articles.

6. Regular Updates and Community Support: WordPress regularly updates its core software, not only adding new features but also improving security. WordPress has a large and active community where users can access technical support, plugins, themes, and best practice recommendations.

These features make WordPress a highly flexible and extensible platform, suitable for building everything from simple personal blogs to complex enterprise websites.