AI Browser Guide: How Agents Read Your Site
What an ai browser can actually read and click on your site: forms, menus and logins, plus a 10-minute self-test you can run on your own pages.
Olga Kunger 13 min read
Technical guides.
Crawler access, rendering, structured data and site health for AI search.
65 articles, newest first
PHP Vulnerability 2026: What Site Owners Do Now
The PHP vulnerability patched on 21 October 2026 lets attackers run code without logging in. Which versions fix it, who is exposed and what to do this week.
Olga Kunger 15 min read
Static vs Dynamic Website: Which Is Safer?
Static vs dynamic website after PHP2Shell: why pre-built pages dodge a runtime flaw, where risk moves in a static stack and a decision path for choosing.
Olga Kunger 13 min read
Soft 404: Why Google Flags It and the Fix
A soft 404 is a page that looks missing or empty but returns 200 OK. See the patterns that trigger the label and the correct status code for each.
Olga Kunger 12 min read
NLWeb: What It Is and Who Should Care
NLWeb explained without the hype: what Microsoft's open project documents, what it does not prove, and a plain test for whether your site should adopt it now.
Olga Kunger 12 min read
Server Side Rendering: SEO Trade-Offs
Server side rendering vs static generation vs client rendering for Google and AI crawlers, with a decision rule by site type and a test you can run today.
Olga Kunger 12 min read
CCBot and Common Crawl: Allow or Block?
CCBot feeds Common Crawl, a dataset behind many AI models. See what blocking it changes, what it does not, and how to verify real CCBot visits in your logs.
Olga Kunger 14 min read
GPTBot vs OAI-SearchBot vs ChatGPT-User
GPTBot, OAI-SearchBot and ChatGPT-User do three different jobs. See which one controls ChatGPT search visibility and the robots.txt rules for each goal.
Olga Kunger 12 min read
Robots.txt Tester: 4 Ways to Check Your File
A robots.txt tester compared four ways: Search Console, URL Inspection, a custom-file web tool and Google's open-source parser, with the CSS/JS blocks to catch.
Olga Kunger 15 min read
Screaming Frog: A Practical Crawl Setup Guide
Screaming Frog setup for SEO audits: the storage, robots, rendering and extraction settings that matter, plus how to test AI crawler access and what to export.
Olga Kunger 15 min read
ClaudeBot: What It Crawls and How to Control It
ClaudeBot is Anthropic's training crawler, one of three Claude bots. See what each does, the robots.txt rules to control them, and how to check your logs.
Olga Kunger 14 min read
Redirect Loops: Find and Fix Them Fast
Redirect loops send browsers in circles. Find which rule loops with curl, then fix the HTTPS, www, trailing slash, plugin or CDN cause behind it.
Olga Kunger 15 min read
404 Errors: When to Fix, Redirect or Ignore
How to triage 404 errors from Search Console and crawls: which to fix, which to 301 redirect, and which to leave alone, with a decision tree and checklist.
Olga Kunger 13 min read
410 Gone: When to Use It Instead of 404
410 Gone tells clients a page was removed on purpose. See when a 410 beats a 404, how Google treats both, and the exact Apache and nginx rules to serve one.
Olga Kunger 13 min read
Article Schema: BlogPosting, Authors and Dates
Article schema per Google's docs: Article vs BlogPosting vs NewsArticle, the recommended properties, author markup best practices, dates, images and an example.
Olga Kunger 12 min read
Astro SEO: How This Site Is Built for Search
Astro SEO from a production build: static HTML for crawlers and AI bots, the sitemap integration, canonical and OG tags, one JSON-LD graph, and the caveats.
Olga Kunger 13 min read
How to Do an SEO Audit: The Order That Works
How to do an SEO audit step by step: baseline, crawl, indexation, on-page, content, links and AI visibility, with the tools for each and how to rank findings.
Olga Kunger 12 min read
IndexNow: Setup, API Example and Real Limits
What IndexNow is, which search engines use it, how to create the key file and send the API call, plugin options, and what IndexNow cannot do for Google.
Olga Kunger 13 min read
SEO Title Length: Pixels, Characters, Rewrites
SEO title length explained: Google's actual limit (none), pixel vs character truncation, when titles get rewritten, and a title tag formula with examples.
Olga Kunger 11 min read
Technical SEO Issues: 20 Common Problems, Fixed
The 20 most common technical SEO issues, ranked by severity, with how to detect each one and how to fix it, plus the audit warnings you can safely ignore.
Olga Kunger 13 min read
Crawl Budget: Who Needs to Care and What to Fix
What crawl budget is under Google's July 2026 guidance, who actually needs to care, what wastes it, how AI crawlers add load, and how to read Crawl Stats.
Olga Kunger 13 min read
Review Schema: Google's Rules for Star Ratings
Review schema explained: which types can show stars, the self-serving review rule, Review vs AggregateRating properties, and what triggers a manual action.
Olga Kunger 13 min read
Breadcrumb Schema: BreadcrumbList Guide (2026)
Breadcrumb schema explained: BreadcrumbList syntax, how Google shows breadcrumbs since the 2025 mobile change, matching visible trails, and a full example.
Olga Kunger 11 min read
Duplicate Content SEO: No Penalty, Real Costs
Duplicate content SEO explained: why Google has no duplicate content penalty, the three real costs, where duplicates come from, and how to fix each cause.
Olga Kunger 12 min read
NavBoost: What Google's Click System Means
NavBoost explained from primary sources: what the DOJ case revealed, the leaked click attributes like goodClicks and badClicks, and what it means for titles.
Olga Kunger 12 min read
Product Schema: Snippets vs Merchant Listings
Product schema per Google's current docs: product snippets vs merchant listings, required properties, Offer rules, ratings, and org-level shipping and returns.
Olga Kunger 12 min read
Redirects SEO: 301, 302, 307 and 308 Compared
A redirects SEO guide: how Google treats 301, 302, 307, 308, meta refresh and JavaScript redirects, when to use each, and how to avoid chains and loops.
Olga Kunger 13 min read
Event Schema: Google's Rules, Status and Dates
Event schema per Google's current docs: required properties, what counts as an event, online vs in-person support, eventStatus changes, dates and an example.
Olga Kunger 12 min read
Google Search Console Guide, Report by Report
A Google Search Console guide that goes report by report: setup, Performance, regex filters, Page indexing, sitemaps, Core Web Vitals, links and AI Overviews.
Olga Kunger 12 min read
Nofollow Links: When to Use Them and Do They Help
Nofollow links explained: Google's 2019 hint model, when to use nofollow, sponsored or ugc, whether nofollow links help SEO, and how to check any link fast.
Olga Kunger 12 min read
Website Redesign SEO: Keep URLs, Keep Rankings
Website redesign SEO for redesigns that keep the same domain and URLs: content parity, template changes that quietly break SEO, safe testing, and launch QA.
Olga Kunger 13 min read
Internal Linking: A Practical Guide for SEO
Internal linking explained: how links help Google find and weigh pages, hub and spoke structure, orphan pages, anchor text rules, and a step-by-step audit.
Olga Kunger 13 min read
Local Business Schema: Subtypes, Hours, Locations
Local business schema done right: choosing a LocalBusiness subtype, the properties Google uses, opening hours, geo and areaServed, and multi-location markup.
Olga Kunger 12 min read
Programmatic SEO: When It Works, When It's Spam
Programmatic SEO explained: when template pages built on real data work, when they become scaled content abuse under Google policy, and the gates between.
Olga Kunger 13 min read
Schema Markup Generator: When to Use One (2026)
When a schema markup generator is fine, where generators fall short (stale types, no @id graph), how to judge one, and a hand-written template to use instead.
Olga Kunger 13 min read
Enterprise SEO: Governance, Scale and AI Search
Enterprise SEO is SEO where the site is too big for one team to fix by hand. Governance, template QA, crawl at scale, log analysis and AI visibility by market.
Olga Kunger 14 min read
Site Speed Optimization: Where the Time Goes
A practical site speed optimization guide: measure field data first, then fix the server, caching, images, fonts, JavaScript and third-party scripts in order.
Olga Kunger 12 min read
Hreflang: Syntax, Return Tags and x-default
How hreflang works: valid language and region codes, return tags, x-default, the three ways to implement it, canonical interaction and the most common errors.
Olga Kunger 13 min read
JSON-LD Explained: Syntax, @id, @graph, Examples
JSON-LD explained for SEO: what @context, @type, @id and @graph do, nesting vs referencing, where the script goes, and a complete example you can adapt.
Olga Kunger 13 min read
Schema Markup Validator: How to Read the Results
How to use the schema markup validator at validator.schema.org, read its errors and warnings, check a JSON-LD graph, and know when to use Rich Results Test.
Olga Kunger 13 min read
XML Sitemap: Format, Limits and What to Leave Out
How an XML sitemap works: the sitemaps.org format, the 50,000 URL and 50MB limits, index files, honest lastmod, submitting to Google and Bing, what to exclude.
Olga Kunger 12 min read
Bing Webmaster Tools: Setup, Reports and AI Data
A practical Bing Webmaster Tools guide: import from Search Console, verify, submit sitemaps and IndexNow, read the reports, and use the AI Performance data.
Olga Kunger 14 min read
Canonical Tag: How rel=canonical Really Works
What a canonical tag does, why Google treats it as a hint, when to use it instead of a redirect or noindex, and the mistakes that make Google ignore it.
Olga Kunger 13 min read
Rich Results Test: A Step-by-Step Guide (2026)
How to use the Rich Results Test: URL vs code mode, reading errors and warnings, which types it still supports in 2026, and what passing does not guarantee.
Olga Kunger 13 min read
Semantic Search: How It Works and Why It Matters
Semantic search explained: embeddings, vector similarity and hybrid retrieval, Google's path from Hummingbird to BERT and MUM, and what it means for content.
Olga Kunger 13 min read
Ecommerce SEO: Categories, Facets and AI Shopping
Ecommerce SEO in practice: category vs product pages, faceted navigation that doesn't waste crawl, Product and Offer data, and how AI shopping picks products.
Olga Kunger 14 min read
Shopify SEO: URLs, Duplicates, Speed and Apps
Shopify SEO beyond the basics: fixed URL paths, duplicate product URLs from collections, robots.txt.liquid, theme speed, app bloat and the schema gaps to fill.
Olga Kunger 11 min read
Service Schema: How to Mark Up Your Services (With Template)
Service schema explained: what the Service type does and does not do, the properties that matter, a copy-ready JSON-LD template, and the common mistakes.
Olga Kunger 6 min read
Technical SEO Checklist for AI Search (2026)
A technical SEO checklist for 2026 that covers AI crawlers too: crawl access, indexation in Google and Bing, rendering, speed, structured data, and logs.
Olga Kunger 6 min read
Website Migration SEO Checklist: Keep Rankings and AI Citations
A website migration SEO checklist for redesigns, replatforms, and domain moves: what to capture before, ship on launch day, and watch for 90 days after.
Olga Kunger 6 min read
The sameAs Property: How to Link Your Brand Entity
sameAs tells engines which external profiles are the same entity as you. What belongs in it, what does not, and why a short verified list wins.
Olga Kunger 5 min read
Agentic Search: Preparing Your Site for AI Agents That Act
AI agents are moving from answering questions to completing tasks: comparing, booking, buying. Here's what that changes about how your site needs to work.
Olga Kunger 6 min read
Image SEO for AI Search: How Multimodal Models Read Your Visuals
Multimodal AI reads your images directly, not just your alt text. What that changes about filenames, captions and ImageObject markup.
Olga Kunger 6 min read
Content Chunking for AI: How to Structure Pages for Retrieval
AI engines retrieve passages, not pages. Here's how chunking and embeddings actually work, and how to structure content so your paragraphs survive the cut.
Olga Kunger 7 min read
Google AI Mode: How It Works and How to Show Up In It
Google AI Mode explained: how query fan-out works, why it differs from AI Overviews, and the practical steps to become a source it pulls into answers.
Olga Kunger 7 min read
Retrieval vs Citation: Why Being Found Isn't Being Quoted
AI engines retrieve far more pages than they cite. Only 15% of retrieved pages reach the answer. Here's what happens in between and how to survive the cut.
Olga Kunger 6 min read
Should You Block AI Crawlers? The Case Both Ways
Blocking GPTBot or opting out of AI Overviews protects content but costs visibility. Here's the honest tradeoff, who each side suits, and the middle path.
Olga Kunger 7 min read
How to Track AI Traffic in GA4 and Search Console
AI engines send traffic but hide the attribution. How to build AI referral reporting in GA4, what Search Console shows, and what stays invisible.
Olga Kunger 6 min read
What Is llms.txt (and Is It Worth Building)?
llms.txt explained: what the proposed file is, who proposed it, whether any AI engine actually reads it yet, how to build one, and when to skip it.
Olga Kunger 4 min read
FAQ Schema for AI Answers: When It Helps (and When It Doesn't)
FAQ schema explained with a full JSON-LD example: what FAQPage markup does, Google's 2023 eligibility change, the visible-Q&A rule, and how to validate it.
Olga Kunger 6 min read
Core Web Vitals Explained: LCP, INP and CLS
Core Web Vitals explained: what LCP, INP and CLS measure, the good thresholds, the usual causes and fixes, and how they affect crawling and AI retrieval.
Olga Kunger 4 min read
Structured Data for AI Search: Which Schema Types Matter
Which schema types matter for AI search: Organization, WebSite, BreadcrumbList, Article, Person, Service and FAQPage, what each does, and how to prioritize.
Olga Kunger 6 min read
JavaScript Rendering and AI Crawlers: What Breaks and How to Fix It
Most AI crawlers do not run JavaScript, so client-rendered content is invisible to them. How to test what bots receive, what breaks, and how to fix it.
Olga Kunger 4 min read
robots.txt for AI Crawlers: GPTBot, PerplexityBot and Google-Extended
Every AI crawler user-agent that matters, what each one does, how to allow or block them, a sample robots.txt, and why your CDN may override all of it.
Olga Kunger 5 min read
Organization Schema for AI Search: The Connected Graph
Organization schema explained with a full example: the properties Google uses, the stable @id pattern that connects your graph, validation, and mistakes.
Olga Kunger 5 min read
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