On-page SEO refers to the optimization of individual web pages to rank higher and earn more relevant traffic from search engines. It includes optimizing the following elements:

1. Title tags: A title tag is the text that appears in the search engine results and should be descriptive, concise, and relevant to the content on the page.

2. Meta descriptions: A meta description is a short summary of a web page that appears in the search engine results and should be compelling and relevant to the content on the page.

3. Headings: Headings (H1, H2, H3, etc.) are used to structure the content on a web page and should be used to create a clear hierarchy of information.

4. Content: The content on a web page should be high-quality, relevant, and original. It should also include relevant keywords and be optimized for readability.

5. URL structure: URLs should be descriptive, concise, and easy to read, and they should reflect the hierarchy of the content on the page.

6. Images and videos: Images and videos should be optimized for search engines by including descriptive file names, alt tags, and captions.

7. Internal links: Internal links should be used to connect related content on a website and help users and search engines navigate the site more easily.

By optimizing these elements, you can improve the ranking and visibility of your web pages in search engine results and drive more relevant traffic to your site.