WordPress theme vs page builder

A theme defines the site's underlying presentation and templates. A page builder primarily gives you a visual system for composing content and layouts.

Where responsibilities overlap

Modern themes, theme builders and block plugins blur the line. That is why it helps to decide which layer should own headers, footers, content templates and page sections before you build.

Avoid duplicate systems

Two tools capable of controlling the same component can create confusing maintenance. Pick a primary owner for global layout and use other tools only where they add clear value.