Technical SEO is the part of SEO that developers own. Content strategy is a different skill — but page speed, crawlability, structured data, and JavaScript rendering are engineering problems with engineering solutions.
The Google factors that matter most in 2026 based on ranking correlation data:
Core Web Vitals are a confirmed ranking signal. LCP, INP, and CLS scores in the 'good' range give a moderate ranking boost, but the correlation with rankings is weaker than content relevance. The correct framing: good Core Web Vitals prevent a ranking penalty, they don't create a ranking advantage.
Crawl budget matters for large sites. Googlebot has a limited crawl budget per domain. Wasting it on low-value URLs (faceted navigation, session IDs, print pages, parameter variants) means important pages get crawled less frequently. Block low-value URLs via robots.txt disallow or canonical tags. For e-commerce sites with 100K+ product pages, crawl efficiency is a first-order SEO concern.
Structured data (JSON-LD) enables rich results. FAQ schema adds expandable Q&A in search results. HowTo schema adds step-by-step markup. Product schema adds prices, ratings, and availability. Article schema adds byline and publish date. These don't directly boost rankings but increase click-through rates by 20-30%.
JavaScript SEO: Googlebot renders JavaScript but with a delay of hours to weeks between crawl and render. Critical content must be in the initial HTML response. Use Server-Side Rendering or Static Generation for content that needs to be indexed. Defer non-essential JavaScript. Check 'URL Inspection' in Google Search Console to see how Googlebot renders your pages.
Internal linking is underrated. Pages with more internal links are crawled more frequently and rank better. Link to your most important pages from your highest-traffic pages. A flat site architecture (every page reachable in 3 clicks from home) is better for both users and Googlebot.