The WordPress block editor builds content from separate elements such as paragraphs, headings, images and groups. Gutenberg is the project that introduced this approach. The block editor became the default editing experience with WordPress 5.0 in December 2018.
What changed from the Classic Editor?
The Classic Editor centred on one main content field. Blocks make the structure more explicit: an image, a heading and a list are distinct editable elements. Editors can select, move and configure those elements without treating the entire page as one large document.
This does not mean every block-based page is easy to maintain. A page stored as one Custom HTML block still asks an editor to manage markup. The useful change is choosing native blocks and well-designed components that expose the controls an editor actually needs.
Blocks, patterns and templates do different jobs
Blocks are the individual elements
A heading block contains a heading. A group organises other blocks. A specialist block can render a project index or form while keeping its data separate from the layout. Use the simplest block that describes the content accurately.
Patterns are useful compositions
A pattern supplies a starting arrangement, such as a service introduction with an image and two links. It can save time and maintain a consistent design. Decide whether each use should remain synchronised or become independent content before giving it to an editorial team.
Templates control repeated page structure
A template defines where elements such as the header, title, post content and footer appear. In a block theme, the Site Editor can expose this structure. Editing a shared template can affect many pages, so it needs a different level of care from changing one article.
How to keep editing useful
Begin with the actual publishing tasks. An editor may need to change a service description, swap a photograph or reorder a project list. They rarely need arbitrary control over every margin and font. Set useful defaults and explain the shared parts of the design.
Use heading levels to describe the document hierarchy, not to choose a visual size. Keep link labels descriptive, provide meaningful image alternatives and check the layout with realistic content. Very long titles and missing images should be part of that review.
What about an existing Classic Editor site?
Review a representative set of pages before converting the whole site. Shortcodes, embedded forms, custom fields and old page-builder markup may need a specific migration path. Preserve a reviewable copy of the original content and compare the rendered result after conversion.
For a commercial handover, check that the saved blocks validate, that editors can change the key content, and that shared components behave consistently. A visually accurate page with an unusable editing experience is still unfinished.
Choosing the right level of customisation
Use core blocks where they cover the requirement. Build a custom block when the content model or behaviour justifies one, rather than wrapping ordinary copy in a proprietary component. Keep persistent data and business functionality independent of the theme where possible.
For the background, see the WordPress 5.0 release announcement and the official block editor documentation. For implementation support, see custom WordPress development, or start with what WordPress does.
