SEO is often treated as something that happens after a website is built. By then, several design decisions have usually already limited how well it can perform.
Navigation Structure
A clear, crawlable navigation hierarchy helps search engines understand which pages matter most. JavaScript-only menus that don’t render server-side can hide entire sections from crawlers.
Heading Hierarchy
Designers sometimes choose heading tags (H1, H2, H3) based on visual size rather than logical structure. Search engines use heading hierarchy to understand page structure — get it out of order and you lose a free relevance signal.
Image-Heavy Homepages
A visually striking homepage built almost entirely from images, with text baked into the graphics instead of live HTML, gives search engines almost nothing to index.
URL Structure
Decided at build time and expensive to change later — clean, logical URLs set at launch avoid a costly redirect project down the line.
This is why SEO and web design work best as one process rather than two separate teams handing off at the end.
