The most important on-page SEO factors for 2023 are:

1. High-Quality Content: Create content that is informative, engaging, and useful to the user.
2. Keyword Research: Use keyword research tools to identify the most relevant and high-volume keywords for your content.
3. Title Tag: Optimize your title tags to include relevant keywords and accurately describe the content on the page.
4. Meta Description: Write compelling meta descriptions that entice users to click through to your page.
5. Heading Tags: Use H1 and H2 tags to structure your content and make it easier to read.
6. Content-Length: Aim for longer content pieces that provide in-depth information about a topic.
7. Internal Linking: Link to other relevant pages on your site to help users navigate and improve the crawlability of your site.
8. Image Optimization: Optimize images with descriptive filenames and alt tags to improve accessibility and user experience.
9. Page Speed: Optimize your site’s loading speed by compressing images, minifying code, and using a content delivery network (CDN).
10. Mobile-Friendliness: Ensure your site is mobile-friendly and easily accessible on mobile devices.
11. URL Structure: Use descriptive URLs that accurately reflect the content of the page.
12. User Experience (UX): Focus on creating a positive user experience by improving site navigation, using readable fonts, and avoiding intrusive ads.
13. HTTPS/SSL: Use HTTPS/SSL to secure your site and improve user trust.
14. Social Sharing: Encourage social sharing of your content to increase visibility and drive traffic to your site.
15. Structured Data: Use structured data to help search engines understand the content on your site.
16. Canonical Tags: Use canonical tags to indicate the preferred version of a page when multiple versions of the same page exist.
17. Schema Markup: Use schema markup to provide additional context and information to search engines about your content.
18. Content Updates: Regularly update your content to keep it fresh and relevant.
19. Outbound Links: Link to high-quality, authoritative sites to improve the credibility of your content.
20. User-Generated Content: Encourage user-generated content, such as reviews and comments, to improve engagement and provide social proof.
21. Analytics and Tracking: Use analytics tools to track user behavior and optimize your site for improved performance.