On-page SEO by the numbers: 7 best practices backed by data (2026)

The top organic result on Google gets an average 27.6% of clicks, and moving up a single position increases CTR by 2.8 percentage points, according to a Backlinko analysis of 4 million search results. Going from second to first place means 74.5% more clicks.

On-page SEO is everything you optimize on the page itself to win those rankings and clicks: the title, headings, meta description, URL, images and speed. It is the part of SEO that depends 100% on you. Even so, a large share of the web still misses the basics.

Have a title tag98.2%

Use HTTPS88.9%

Have at least one H170%

Have a meta description66.4%

Have a canonical tag65%

Source: HTTP Archive, Web Almanac 2024 (SEO chapter)

View the data as a table

Have a title tag	98.2%
Use HTTPS	88.9%
Have at least one H1	70%
Have a meta description	66.4%
Have a canonical tag	65%

Almost every page has a title, but one in three has no meta description and 30% have no H1. These are the seven practices that matter most, with the data behind them.

1. Write titles of 50 to 60 characters

The title (the <title> tag) is the first thing a user sees on Google. But Google doesn't always show it as written: a Zyppy study of 80,959 titles from 2,370 sites found that Google rewrote 61.6% of them.

Length is the biggest factor. Titles of 51 to 60 characters were rewritten the least (between 39% and 42%), while titles over 70 characters were rewritten 99.9% of the time. The web's median is far from that range: mobile page titles are 79 characters long, according to the Web Almanac 2024.

Over 70 characters99.9%

1 to 5 characters96.6%

With text in [brackets]77.6%

With text in (parentheses)61.9%

Average of all titles61.6%

Source: Zyppy, study of 80,959 titles (2022)

View the data as a table

Over 70 characters	99.9%
1 to 5 characters	96.6%
With text in [brackets]	77.6%
With text in (parentheses)	61.9%
Average of all titles	61.6%

Length also affects clicks: in the Backlinko study, titles of 40 to 60 characters had the highest CTR.

Best practices from Google's official guide: a unique title for each page, descriptive and concise, without repeated keywords, with the brand name at the start or end separated by a hyphen or colon.

2. Make the H1 match the title

Google doesn't only look at the <title> tag to build the title it shows. It also uses the page's visible title, headings such as the H1, the text of links pointing to the page and other signals, according to its documentation.

That is why Google changes titles less when the H1 and the title say the same thing. Zyppy measured one specific case: when both the title and the H1 include the same number (for example, "7 practices"), Google keeps a number in the title 97.3% of the time. When the number is only in the title, Google removes it in 25.8% of cases.

Even so, 30% of pages have no H1 at all, according to the Web Almanac 2024.

3. Write the meta description even if Google changes it

According to an Ahrefs study of 20,000 keywords, Google rewrites the meta description 62.78% of the time and shows a snippet of the page text instead. For long-tail searches the figure rises to 65.62%.

Is it still worth writing? Yes, for two reasons:

• In almost 4 out of 10 searches, Google does show the description you wrote.
• Google uses it when it thinks it describes the page better than the page text itself, according to its snippet guide.

Google sets no character limit, but it truncates long descriptions to fit the screen. It recommends a unique description for each page that summarizes the whole page and isn't a list of keywords.

4. Use short, descriptive URLs

In Backlinko's analysis, URLs similar to the search keyword had a 45% higher CTR than those that weren't. This is a correlation, not proof that the URL causes the increase, but it points the same way as common sense: a URL like /on-page-seo tells users what they'll find before they click.

5. Describe every image with alt text

The alt attribute describes an image for people using screen readers and for Google. On the median mobile page, only 58% of images have alt text, according to the Web Almanac 2024.

Good alt text describes what the image shows in a few words ("chart of CTR by Google position") and doesn't stuff keywords.

6. Pass Core Web Vitals

Core Web Vitals are the metrics Google uses to measure a page's loading, responsiveness and visual stability. These are the thresholds for a "good" page, according to web.dev:

Metric	What it measures	Good	Poor
LCP	How long the main content takes to load	2.5 seconds or less	Over 4 seconds
INP	How long the page takes to respond to a click or tap	200 milliseconds or less	Over 500 milliseconds
CLS	How much content shifts while loading	0.1 or less	Over 0.25

Google evaluates these metrics with real-user data, not lab tests: a page passes when at least 75% of visits meet the threshold.

Most sites don't. In 2024, only 43% of mobile sites passed all three metrics at once (54% on desktop), according to the Web Almanac 2024 performance chapter. The weakest point is loading speed.

CLS (stability)79%

INP (responsiveness)74%

LCP (loading)59%

All three at once43%

Source: HTTP Archive, Web Almanac 2024 (performance chapter)

View the data as a table

CLS (stability)	79%
INP (responsiveness)	74%
LCP (loading)	59%
All three at once	43%

7. Get the technical basics right: HTTPS and canonical

These are two settings you configure once that protect the whole site:

• HTTPS: 88.9% of mobile pages already use it. A site without the padlock is in the minority, and browsers flag it as "not secure".
• Canonical tag: tells Google which version of a page is the main one when there are several similar versions, for example with and without URL parameters. 65% of mobile pages use it.

On-page SEO checklist

Practice	Target	Key figure
Title	50 to 60 characters, unique, with the keyword	Google rewrites 61.6% of titles
H1	One per page, aligned with the title	30% of pages have no H1
Meta description	Unique, summarizing the page	Google rewrites it 62.78% of the time
URL	Short, with the keyword	45% higher CTR for descriptive URLs
Images	Alt text on all of them	Only 58% of images have it
Core Web Vitals	LCP ≤ 2.5 s, INP ≤ 200 ms, CLS ≤ 0.1	Only 43% of mobile sites pass
HTTPS and canonical	Enabled across the site	Used by 88.9% and 65% of pages

A caveat: the Zyppy (2022) and Ahrefs (2020) studies are one-off measurements, and Google changes its systems often, so the exact figures may have shifted. The trend holds: clear, short titles and descriptions that match the page are the ones Google respects most.