On-page SEO: title tags, meta descriptions, H1 and internal links

What on-page SEO is and what it covers

It helps to separate on-page from technical and off-page SEO, because each has different owners. Technical SEO is about crawling and speed, off-page about authority outside the site. On-page concerns a specific page's content and is usually shared work between content and development.

For the bigger picture of all SEO areas, see our what is SEO guide.

Title tags: how to write them

The title tag is the text inside the HTML <title> element that appears as the blue headline in search results. It is the most important on-page element for both ranking and clicks. Google explains how titles are chosen in its title link documentation.

Length: how many characters

Google truncates by pixel width, not character count. A practical rule: a 50–60 character title usually shows in full on desktop. Longer titles are cut with "..." — not a penalty, but key information at the end may be lost.

Rules for a good title

• Place the main keyword near the start.
• Make every page's title unique — dozens of pages with the same title confuse Google.
• Add the brand briefly at the end: "... | ClickOptimize".
• Promise what the page actually delivers; clickbait titles cause quick bounces.
• Avoid all caps and emoji clutter.

Examples

Why Google rewrites titles

Sometimes Google shows your H1 or other page text instead of your title. This usually happens when the title is too long, stuffed with keywords or does not match the content. The fix: keep the title and H1 close to each other and honest to the content.

Meta descriptions: writing for the click

The meta description is the short summary shown under the title in results. Google says it is not a ranking signal, but a well-written description affects clicks. The rules are in its snippet documentation.

Length and structure

150–160 characters is the practical recommendation: enough for the main message and one benefit. Mobile may show less, so put the most important information in the first 120 characters.

• State the page's main benefit in one sentence.
• Include the keyword naturally — Google may bold it.
• Be specific: "delivery within 24 hours" beats a generic "quality service" (if it is true).
• Write one per page; the same description everywhere is useless.

What if I do not write one

Google will pick a snippet from the page text. Sometimes that works, sometimes it shows menu text or a random sentence. For key pages — services, product categories, blog posts — writing it yourself is more reliable.

H1–H3 structure and body text

Title tag vs H1

The title appears in search results, the H1 is the main headline on the page. They can be the same but do not have to be: the title is short and click-oriented, the H1 can read more naturally. One H1 per page gives the clearest structure.

H2 and H3: a map of the content

H2s are main sections, H3s their sub-parts. A well-built heading hierarchy helps readers scan the page and helps search and AI systems understand which question each section answers.

• Use headings for meaning, not styling (use CSS for big text).
• Match H2s to real user questions: "What affects the price", "How to order".
• Answer directly in the first paragraph of each H2, then add details.

Quality of the text

The biggest part of on-page SEO is the text itself. The page should fully answer the intent and carry experience-based detail (price ranges, process, real examples). This is the basis of E-E-A-T. If you use AI for content, we describe a quality-control process in this article.

URLs, images and internal links

URLs

Choose short, readable URLs that reflect the topic: /en/services/seo, /en/blog/what-is-seo. Azerbaijani letters (ə, ş, ç) get encoded and look like "e-ticar%C9%99t" when shared, so Latin-only slugs are more practical. If you change a URL, always 301-redirect the old address to the new one.

Images

• Use meaningful file names: black-office-chair.webp, not IMG_2034.jpg.
• Alt text should briefly describe the image; do not stuff keywords.
• Set dimensions (width/height) so the page does not shift while loading (CLS).
• WebP/AVIF and correct sizing help speed.

Internal links

Internal links take users to related pages and show Google your site structure. Use descriptive anchor text: "technical SEO checklist" instead of "click here". When you publish a new post, link to it from older related posts — otherwise it stays an "orphan".

For example, from this article we link to our technical SEO checklist and the Quality Score article — the latter shows how landing page relevance in Google Ads ties into on-page work.

On-page SEO checklist (12 points)

Go through this list before publishing any new or updated page:

1. The page has one main query and intent.
2. The title is unique, 50–60 characters, main keyword near the start.
3. The meta description is 150–160 characters and states a specific benefit.
4. There is one H1 that clearly shows the topic.
5. The H2/H3 order is logical and matches real questions.
6. The first paragraph answers the main question directly.
7. The text contains experience-based detail and sourced numbers.
8. The URL is short and uses Latin letters.
9. Images have alt text and dimensions.
10. There are at least 3 relevant internal links, and other pages link to this one.
11. The canonical points correctly to itself or the main version.
12. A conversion element (form, call, CTA) is visible.

Mistake: the same "Home | Company name" title on every page. The Pages report in Search Console and crawling tools find these duplicates quickly.

Frequently asked questions

Conclusion

On-page SEO makes a page clear for both readers and search systems. With the title, meta description, heading structure and internal links done right, the same content appears for more queries and earns more clicks.

To learn this systematically, take a look at our SEO course.