SEO gets treated as a marketing-only concern on a lot of projects, which means technical decisions that quietly hurt rankings get made by developers who were never told those decisions mattered for search.
Crawlability comes before content
A perfectly optimized page that a search engine can’t actually reach — blocked by robots.txt, missing from the sitemap, or buried behind JavaScript rendering the crawler doesn’t execute — delivers zero SEO value no matter how good the content is. Crawlability is a technical decision, not a content one.
Core Web Vitals are a development concern, not a plugin’s job
Largest Contentful Paint, Cumulative Layout Shift, and interaction responsiveness are determined by real architecture decisions — image handling, script loading order, layout stability — not something a single SEO plugin can fix after the fact.
URL structure and redirects matter more than they seem to
Clean, stable URLs that don’t change unnecessarily, and proper 301 redirects whenever they do, preserve the ranking signal a page has already earned. A development team that changes URL structures casually, without redirects, is quietly discarding that signal.
Structured data is a development task
Schema markup — identifying what a page actually is to a search engine, not just what it displays to a human — is written in code, not configured in a marketing dashboard. It’s most naturally built in alongside the templates themselves, not retrofitted later.
The actual fix
Treating technical SEO as a shared concern between development and marketing, with basic SEO literacy built into how development decisions get made, prevents most of these problems before they ever need “fixing” after launch.