FreeCodeCamp's Responsive Web Design curriculum is a legitimate foundation. You learn HTML semantics, CSS Flexbox, Grid, and media queries through hands-on projects, all free. Those core skills translate directly to real work. If you complete the certification and build the five projects, you'll understand how to structure a page that adapts across devices, which is more than many WordPress theme customizers can claim. The gaps show up when you compare it to agency-level work. FreeCodeCamp doesn't teach component-based thinking, CSS preprocessing like Sass, or how to optimize for Core Web Vitals. You won't learn how to audit a site in Lighthouse, handle retina images efficiently, or structure styles for a 50-page site that three developers touch. Accessibility is introduced but not drilled into practice, so you might pass the projects without learning ARIA landmarks or keyboard navigation patterns. For context, when we hire at Ottawa SEO, a FreeCodeCamp cert signals someone has motivation and can read documentation, but we still expect a 3–6 month ramp-up. The curriculum skips Git workflows, build tools, and how responsive design intersects with page speed, which matters when a client's bounce rate climbs because mobile users wait 4.5 seconds for hero images to load. The certification works best as a stepping stone. Pair it with real projects, even rebuilding local business sites as practice. Study how established agencies structure CSS, look at how Shopify or WordPress themes handle breakpoints in production, and learn enough JavaScript to understand how responsive behavior often depends on scripting, not just media queries. Bottom line: FreeCodeCamp RWD is good for learning the syntax and concepts. It's not sufficient alone for professional work, but it's a solid starting point that costs nothing except time. If you finish it, immediately apply the skills to a real project with performance constraints and accessibility audits, and you'll bridge the gap faster than someone who just watches tutorials.