What Is a WordPress Page Builder?
A WordPress page builder provides a visual interface for composing and styling page layouts. Depending on the product, it may also control theme parts such as headers, footers, archives and product templates.
Builder vs theme
A theme provides site-level presentation and templates; a builder provides an editing interface. Some products combine both roles.
Builder vs block editor
WordPress itself has a block-based editor. Third-party builders add their own interface and design system on top of WordPress.
Why people use them
They reduce the amount of custom HTML and CSS required for bespoke layouts.
Why some people avoid them
A simpler native stack can reduce dependencies and make content more portable.
A practical way to decide
Use this page as a shortlist, then test the workflow against a real page you expect to maintain. Pay attention to editing speed, responsive behavior, reusable styles, licensing and how comfortable the future editor will be making routine changes.