Google has changed more in the last two years than in the five before that. The rollout of AI-generated search summaries (AI Overviews), the switch from FID to INP as a Core Web Vital, and a heavier weighting of real user signals have fundamentally shifted what technical SEO actually means in practice.
What INP is, and why it matters
Since March 2024, Interaction to Next Paint (INP) has been the official Core Web Vital, replacing the older FID metric. Where FID only measured a page's first interaction, INP scores every interaction across an entire visit. An INP under 200ms is considered good; above 500ms needs work. For a lot of sites, that means heavy JavaScript frameworks and blocking event handlers are now directly visible in rankings - there's nowhere left to hide a sluggish frontend.
AI Overviews are changing click behavior
Google's AI Overviews now show an AI-generated summary at the very top of results for a large share of queries. For informational searches that used to reliably produce a click, users increasingly stay on the results page. What still works: structured content that's citable as a source. Schema.org markup, clearly organized articles with a real H2/H3 hierarchy, and factually dense writing all increase the odds of being cited as a link inside the AI summary rather than replaced by it.
The technical factors that actually matter right now
LCP (Largest Contentful Paint): under 2.5 seconds. The largest visible element on the page needs to load fast.
CLS (Cumulative Layout Shift): under 0.1. Elements shouldn't jump around unexpectedly as the page loads.
INP (Interaction to Next Paint): under 200ms. Every interaction needs to feel instant.
A clean, crawlable site structure, correct canonical tags, complete hreflang implementation for multilingual sites, and a valid robots.txt are still non-negotiable table stakes. Get these basics wrong and you leave ranking potential on the table no matter how good the content is.
What SMBs should actually do about it
Check PageSpeed Insights regularly and actually fix the INP issues it flags. Implement Schema.org markup correctly for LocalBusiness and article pages. Enforce HTTPS with HSTS. Keep og:image and og:title current on every page that matters. The biggest lever remains content itself: writing that answers real questions, is clearly structured, and is factually solid ranks better than it ever has. Google is getting noticeably better at detecting - and demoting - AI-generated content with no real substance behind it.
Bottom line
Technical SEO in 2026 rewards exactly what good software engineering has always rewarded: clean structure, speed, reliability and real depth of content. The technical bar has gone up - but clearing it is now a durable advantage over competitors who still treat SEO as an afterthought.