On-pageยท
The H1 tag: one per page and what to put in it
What Google has said about the H1 tag and multiple H1s, how the H1 differs from the title tag, what to write in it, and the H1 mistakes worth fixing.
On-page SEO and social previews
Title tags, meta descriptions, headings, images and link previews.
Latest guides19 guides, newest first.
- On-page
Header tags for SEO: how to structure H1 to H6
Header tags for SEO work as an outline. How to nest H1 to H6, when skipped levels matter, and how to write headings AI answers can quote.
- On-page
Image alt text: how to write it for SEO and accessibility
How to write image alt text that helps screen readers and Google Images, with good and bad examples, decorative images, linked images and length.
- On-page
Image SEO: file names, size, formats and lazy loading
Image SEO beyond alt text. How to name image files, pick WebP or AVIF, size files, stop layout shift, use srcset, lazy-load safely and help Google find images.
- On-page
How to write a meta description that earns the click
How to write a meta description, why it is not a ranking factor, why Google rewrites most snippets, and a five-step method for writing one that gets clicked.
- On-page
Meta description examples that earn clicks
Before and after meta description examples for seven page types, from product and pricing pages to docs and local business, with why each rewrite wins.
- On-page
Meta description length: how many characters Google shows
Google sets no meta description length limit. It cuts snippets by pixel width. The ranges that fit desktop and mobile, and when max-snippet matters.
- On-page
Meta viewport tag: what it does for mobile SEO
The meta viewport tag tells phones how wide to lay out your page. The correct tag, what each value does, why blocking zoom hurts, and the mistakes to fix.
- On-page
og:image not showing? How to fix social previews
og:image not showing when you share a link? The usual causes, from relative URLs and blocked crawlers to JavaScript tags and stale caches, and the fix for each.
- On-page
Open Graph image size: the right dimensions for each platform
The right og image size is 1200 x 630 px. Per-platform minimums, ratios and file size caps from Facebook, LinkedIn, X and WhatsApp docs, plus the tags to set.
- On-page
The on-page SEO checklist: what to check on every page
An on-page SEO checklist grouped by area, from indexability, titles and headings to links, images, schema and social tags, with a test for each item.
- On-page
What is Open Graph? The tags every page needs
What Open Graph is, the four required og tags plus og:description and og:site_name, a copy-paste head block, and how X falls back to og tags.
- On-page
Open graph preview: how to see your card before you share
An open graph preview shows the card before anyone shares your link. Use platform debuggers, preview staging and localhost pages, and read the raw tags.
- On-page
SEO title length: how long should a title tag be?
SEO title length explained. Google has no character limit but cuts titles at about 600px on desktop. What that means in characters and how to check yours.
- On-page
Title tags: how to write ones Google keeps
What a title tag is, how Google builds title links, when it rewrites your title, and how to write unique, front-loaded titles Google shows as written.
- On-page
Twitter Card Validator: how to test X previews now
What happened to the Twitter Card Validator, how to test an X card today, the twitter card tags X reads, and why X keeps showing an old preview.
- On-page
Facebook Sharing Debugger: how to refresh a link preview
How to use the Facebook debugger to refresh a stale link preview, what its warnings mean, and the og:image size and tags Facebook needs.
- On-page
Favicon size: what Google needs to show your icon
The favicon size Google, browsers, iPhones and Android need, with exact link tags and manifest icons, and why Google shows a globe instead of your icon.
- On-page
LinkedIn Post Inspector: fix how your links look on LinkedIn
Use LinkedIn Post Inspector to refresh a stale link preview, see which Open Graph tags and image size LinkedIn needs, and fix why the card breaks.
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