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385 guides, page 8 of 33.
- Security13 min read
What is cloaking in SEO? Why hacked sites show Google a different page
Cloaking in SEO means showing search engines different content from what people see. Google treats it as spam, and hacked sites use it to hide injected links from their owners. Here is how it works and how to see what Googlebot sees.Updated 28 Sept 2026 - Accessibility11 min read
Accessible forms and accessible names: labels, links and buttons
Accessible forms start with one rule that also covers every link and button: each needs an accessible name, the words a screen reader announces. How to label fields, write error messages, and fix icon buttons and "read more" links.Updated 27 Sept 2026 - Accessibility13 min read
Alt text: what it is and how to write it, with examples
Alt text is the short description in an image's alt attribute that screen readers speak, browsers show when the image fails and search engines read. How to write it for decorative, informative, functional and complex images, with examples.Updated 27 Sept 2026 - Speed11 min read
AVIF vs WebP vs JPEG: the best image format for the web
AVIF vs WebP: AVIF usually makes photos smaller at the same look, WebP encodes faster and is the safer all-rounder, and JPEG is still fine in a few places. Which format for which image, the quality settings that work, and how to serve a fallback.Updated 27 Sept 2026 - SEO12 min read
Can Google crawl JavaScript? How Googlebot renders and indexes it
Yes, Google crawls and renders JavaScript: Googlebot fetches the HTML, queues the page, runs your scripts in an up-to-date Chromium and indexes the result. What that render can and cannot see, how long it takes, and how to check what Google got.Updated 27 Sept 2026 - Social13 min read
Clear Facebook cache for a link: fix an old or missing preview
To clear the Facebook cache for a link, purge your own page cache, open the Sharing Debugger, paste the URL and click Scrape Again. How to refresh LinkedIn, X, Slack and WhatsApp, and fix a preview that is missing.Updated 27 Sept 2026 - Security12 min read
Content Security Policy: roll it out without breaking your site
A Content Security Policy tells the browser where your pages may load scripts, styles and frames from. Roll it out from report-only to enforced, with nonces or hashes instead of unsafe-inline.Updated 27 Sept 2026 - Best practices16 min read
Cookie banner requirements: what a compliant banner needs, with examples
A cookie banner asks visitors for permission before a site sets analytics or advertising cookies. What EU and UK rules require from it, examples that pass and fail, and how to build and test one.Updated 27 Sept 2026 - Speed21 min read
Core Web Vitals explained: LCP, INP and CLS, thresholds and how to pass
Core Web Vitals are three Google metrics for how a page feels to real visitors: loading (LCP), responsiveness (INP) and visual stability (CLS). What each measures, the thresholds and how to pass.Updated 27 Sept 2026 - SEO13 min read
Crawl budget: what it is, when it matters and how to optimise it
Crawl budget is the set of URLs Google can and wants to crawl on your site. It matters for sites with 10,000+ fast-changing pages or a million-plus pages; below that, slow indexing has other causes. How to tell, and what to fix.Updated 27 Sept 2026 - Speed12 min read
Cumulative Layout Shift (CLS): what it is and how to fix it
Cumulative Layout Shift scores how much a page jumps while you use it; good is 0.1 or less. Find the element that moves, then reserve its space with width and height, aspect-ratio or a fixed slot. Covers images, ads, embeds, banners and fonts.Updated 27 Sept 2026 - SEO13 min read
Faceted navigation and parameter URLs: keeping filters out of the index
Filters, sort options and tracking tags turn one category into thousands of URLs. Learn which parameter URLs to index, canonicalise, noindex or block, how to handle utm and click ids, and how to see what Googlebot crawls.Updated 27 Sept 2026
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