Rendering, crawl budget, canonical integrity, redirects, and Core Web Vitals, the infrastructure that decides whether a large site ranks at all.
A 10s LCP and CLS in the Poor band aren't just UX, they're a ranking signal and a conversion tax. Where the bloat really comes from (hint: not the images).
Giving every color and size its own URL splits one product's ranking signal across duplicate pages. How to decide which variants become pages, and which collapse.
On a large site, Google won't crawl everything. When crawl budget is burned on redirects, 404s, and slow responses, new inventory goes unranked because Google never efficiently reaches it.
A canonical tag is a suggestion, not a command, and Google overrules it more than most teams realize. On one enterprise site, a tracking parameter caused Google to override the canonical on a fifth...
On a large site, one bad link isn't one problem, it's one problem times every page it renders on. How a single header link created 92% of a domain's redirect chains, and the leverage...
Most AI crawlers don't run JavaScript. If your product content only appears after JS executes, the engines answering your buyers' questions can't see it. Here's the 30-second way to prove it, and the fix....