Guides
In-depth guides
Longer walkthroughs for specific setups: real screenshots, code you can paste and the reason behind every step. The short fix page for each check lives under Learn.
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385 guides, page 3 of 33.
- SEO12 min read
429 too many requests: what it means and how to fix it
A 429 too many requests error means a rate limit fired: some client asked faster than the server allows, and that client can be you, your office, your crawler or your own site. Visitor fixes first, then both owner sides.Updated 19 Oct 2026 - Best practices13 min read
DNS lookup: how to run one and read every record
Run a DNS lookup with dig or nslookup and read every field of the answer: sections, flags, TTLs and all ten record types, with commands to copy.Updated 18 Oct 2026 - SEO11 min read
Perplexity SEO: how Perplexity picks its citations
Perplexity cites sources in every answer and documents more about its crawlers than most AI engines. How it picks citations, and how to get your pages in.Updated 17 Oct 2026 - SEO13 min read
504 error: what gateway timeout means and how to fix it
A 504 error means a proxy in front of the website waited for the server behind it to answer and gave up. Visitor fixes first, then how owners find the request that times out and fix it without blindly raising timeouts.Updated 16 Oct 2026 - SEO20 min read
Google AI Overviews: how to rank in them and what you control
How to rank in Google AI Overviews: how Google picks the pages it links, how to optimize your content, the opt-out controls, and how to track your visibility in Search Console.Updated 16 Oct 2026 - Best practices12 min read
"This site can't be reached": every variant of the Chrome error
"This site can't be reached" is Chrome's cover page for several different failures, and the sub-code underneath decides the fix. Match your code in the table, jump to its fix, or run the checklist that clears most cases.Updated 15 Oct 2026 - Speed13 min read
PageSpeed score: how to read it and what counts as good
A PageSpeed score is a 0-100 summary of five lab metrics from one simulated visit on a phone: 90 or more is good, 50-89 needs improvement, under 50 is poor. Here is what the number means, why it moves and what to fix first.Updated 15 Oct 2026 - Speed16 min read
Reading a waterfall chart and filmstrip: where the seconds go
A request waterfall shows every file a page loads and when; the filmstrip shows what the visitor saw meanwhile. Learn the anatomy of a bar, the six patterns behind most slow pages, how to match frames to metrics, and what to fix first.Updated 15 Oct 2026 - SEO13 min read
503 error: what service unavailable means and how to fix it
A 503 service unavailable error means the server is running and deliberately refusing requests for now: maintenance, overload or a rate limit. The visitor fix first, then how owners end each cause cleanly.Updated 14 Oct 2026 - SEO14 min read
AI search engines in 2026: who answers, who cites, who crawls
The AI search engines that matter in 2026 (ChatGPT, Perplexity, Google's AI features, Copilot and Claude) compared by index, crawlers and citations.Updated 13 Oct 2026 - SEO13 min read
What is SEO? Search engine optimization in plain language
SEO is the work of making your pages easy for search engines to find, understand and recommend. What it covers, what it costs and where to start.Updated 12 Oct 2026 - Best practices21 min read
What is DNS? Records, resolvers and TTLs in plain language
DNS turns the names people type into the addresses machines connect to. How a lookup really travels, every record type that matters, TTLs, caching and the commands to see it yourself.Updated 11 Oct 2026
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