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**On-page SEO** (on-site optimization) is the work done on a page's own content and code so it indexes and ranks better and answers search queries.

### What on-page SEO includes:

1. **Keywords**
Choosing relevant phrases
Inserting them into headings, subheadings, paragraphs, image alt text, meta tags
Without keyword stuffing
2. **Title and Description**
A unique, accurate `<title>` - the main heading in search results
An attractive `meta description` - a short description of the page
3. **Headings h1-h6**
One `<h1>` - the essence of the page
A logical hierarchy of subheadings
4. **URL structure**
Short, readable, with keywords
Without extra parameters and numbers
5. **Content**
Unique, useful, structured
Optimal length, readability, lists, tables
6. **Internal links**
Connections between pages on the site
Help both the user and the search engine navigate
7. **Images and alt tags**
Optimized sizes
Captions via `alt` for SEO and accessibility
8. **Structured data ([Schema.org](http://Schema.org))**
Helps search engines understand structure (for example, reviews, FAQ, products)
9. **Load speed and Core Web Vitals**
Fast, stable, without spikes
10. **Mobile adaptation**
The page works well on all devices

**Conclusion:**
On-page SEO is control over everything inside a single page: from the text to the code. It is exactly what makes content understandable to both people and bots.

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